A lot of LEGO resellers I know are making more sales than ever but still struggling to answer a basic question: am I actually making money? The problem is not effort. It's that most resellers track revenue without tracking the full cost of goods, fees, and time. Once you build a real profit and loss system, what looked like a profitable haul can look very different. And sometimes, things are way more profitable than you realized. Either way, you need the numbers to know.
Key takeaways
- True profit requires tracking cost of goods, platform fees, shipping, and storage, not just sale price.
- Minifigures are easier to profit-track individually than bulk lots, because you can price each piece against current BrickLink comps.
- A simple spreadsheet or dedicated app beats mental math at any volume above a few sales per week.
- Many resellers undercount their cost basis because they forget what they paid for a bulk lot per piece.
- Knowing your average margin per figure or per set lets you make smarter sourcing decisions at garage sales, estate sales, and thrift stores.
- Consistent logging at the time of purchase is the single habit that separates resellers who scale from those who plateau.
Heads up: This is not financial, tax, legal, or investment advice. Prices, fees, and market conditions change. Verify current comps and official platform pages before you buy or sell.
Why do so many LEGO resellers not actually know their profit margin?
Most resellers track what they sold something for, but not what it truly cost them to acquire, store, list, and ship it. When you subtract all of those from the sale price, the real margin is often smaller than the top-line number suggests.
The gap usually comes from a few blind spots. Bulk lot math is the biggest one. You paid a certain amount for a box of loose LEGO, but never broke that cost down to a per-piece or per-figure number. So when you pull a rare minifigure out and sell it, you log the sale price but zero cost basis. That overstates profit.
Platform fees compound this. BrickLink, eBay, and Facebook Marketplace all take a cut, and shipping materials cost money too. From what I've seen, resellers who start logging all of these together usually discover their real margin is 10 to 30 percentage points lower than they assumed.
What costs should LEGO resellers track for an accurate profit and loss statement?
A complete LEGO reselling P&L captures: cost of goods (what you paid, including any buyer's premium or gas to source), platform selling fees, payment processing fees, shipping materials, postage, storage, and any software or tool subscriptions.
Break it into two buckets: variable costs (COGS, fees, shipping) that change with each transaction, and fixed costs (storage, subscriptions, tools) that exist whether or not you sell anything.
On the COGS side, bulk lots need a unit cost allocation. If you paid a certain amount for a lot and pulled 40 minifigures out of it, you need to divide that cost across the pieces, weighted however makes sense for your sourcing strategy. Some resellers allocate evenly. Others weight by expected sale price. Either approach is better than tracking zero cost.
How do I calculate cost of goods for LEGO bulk lots?
Divide your total acquisition cost for the lot by the number of sellable units you pulled from it. "Sellable" means items you actually intend to list. Broken pieces, common bulk filler, or parts you keep personally should be excluded or accounted for separately.
Say you buy a large estate lot for a fixed amount. You sort it and pull out 60 minifigures, 200 parts worth listing individually, and a pile of common bricks you'll sell as bulk by the pound. Divide your total cost across those categories in proportion to their expected revenue share. It's not perfect accounting, but it's close enough to make real decisions.
The part most people skip: check current comps before you buy, not after. Pull up current minifigure comps and estimate what the lot is worth in total. If the numbers don't work at the asking price, walk away or negotiate down. That sourcing discipline is where margin is actually made.
What is a good profit margin for LEGO reselling?
From what resellers in the community report, a healthy margin on minifigures sourced from bulk lots tends to run in the 40 to 70 percent range after fees and shipping, though this varies widely by theme, condition, and how well you sourced. Common themes in common condition compress margins significantly.
The ranges shift based on what you're selling. Hard-to-find minifigures from Star Wars, Harry Potter, or older themes that have been retired for years tend to carry stronger margins. Current-production figures from widely available sets tend to be more competitive. Check BrickLink sold listings and BrickEconomy for recent sale data rather than relying on ask prices, which can be aspirational.
Sets follow a different logic. Retired sets appreciate over time, but storage costs and tied-up capital work against you if you hold too long. Minifigures turn faster for most small resellers because they ship and store easily.
| Cost Category | What to Track | Common Mistakes |
|---|---|---|
| Cost of Goods | Purchase price, per-unit allocation from bulk lots | Logging $0 COGS for items pulled from bulk lots |
| Platform Fees | BrickLink, eBay, FB Marketplace selling fees | Forgetting payment processing fees stacked on top |
| Shipping | Postage + packaging materials per order | Undercharging buyer and absorbing the difference |
| Storage | Dedicated space cost, storage bins and sorting supplies | Treating home storage as "free" when it has real opportunity cost |
| Tools & Software | Scanner apps, listing tools, spreadsheet templates | Not including these when calculating per-item margin |
| Sourcing Travel | Gas, entry fees, time at estate sales and thrift stores | Ignoring sourcing cost on "free" finds that took 3 hours to locate |
Should I use a spreadsheet or dedicated software for LEGO reselling P&L?
Spreadsheets work well at low volume and give you full control over your own formulas. Dedicated inventory and pricing tools save time at higher volume because they handle catalog lookups, pricing data, and item logging in a fraction of the time a manual spreadsheet requires.
The real question is whether your tracking tool can keep up with your sourcing speed. A good estate sale session can yield 50 to 100 minifigures. If logging each one takes five minutes, you'll fall behind and stop doing it. Tools that identify items via photo scan and auto-populate name, ID, and current market comp remove that friction entirely.
This is exactly where brick'em helps. Scan a bulk lot of minifigures with your phone camera, get instant identification and current pricing from the built-in minifigure price guide, and add everything to your inventory in minutes. When you know the value of what you own, building a real P&L is straightforward. brick'em handles the catalog side so you can focus on the numbers that matter.
How do I track profit and loss across multiple selling platforms?
The cleanest approach is to log every sale in one place regardless of platform, tagged with the channel it came from. That gives you a total P&L view plus a per-channel breakdown so you can see where your margins are strongest.
Multi-platform selling creates a reconciliation headache if you don't build the habit early. BrickLink payouts, eBay payouts, and direct sales all hit different accounts on different schedules. Waiting until tax time to reconcile it all is a painful exercise.
A practical system: log each sale immediately when it completes, note the platform, sale price, item cost, and fees. Batch your shipping cost entry weekly. Run your P&L monthly. Quarterly is too infrequent to catch problems early, and daily is too granular to be sustainable for most solo resellers.
What records should LEGO resellers keep for tax purposes?
At minimum, keep: purchase receipts or documentation for every lot you buy, a record of what you paid per item or lot, your platform payout statements, and receipts for any deductible business expenses like shipping supplies, storage, and software subscriptions.
If your reselling qualifies as a business rather than a hobby, you may be able to deduct cost of goods, fees, shipping, storage, mileage, and tools. Work with a tax professional who understands e-commerce reselling, because inventory accounting methods (FIFO, LIFO, specific identification) can affect what you owe. Good records are the prerequisite to any of those deductions.
Common mistakes to avoid
- Tracking revenue only and calling it profit. Revenue minus all costs equals profit. Until you do that math, you don't know the number.
- Not allocating bulk lot cost to individual items. Pulling a minifigure from a lot you haven't costed out means you're flying blind on margin.
- Ignoring small fees. Payment processing, packing tape, bubble mailers, and the occasional lost package add up across hundreds of transactions.
- Confusing cash flow with profitability. A lot of pre-orders or slow-moving inventory can make you feel flush on cash while your actual margins are thin.
- Skipping the comp check before buying. Margin is made at sourcing. If you buy without knowing current sell-through comps, you're guessing.
- Waiting until year-end to reconcile everything. Monthly P'L reviews catch problems early and let you adjust sourcing or pricing strategy while it still matters.
- Not separating personal and business finances. Even a basic separate bank account makes bookkeeping dramatically cleaner and protects you in case of an audit.
Frequently Asked Questions
How do I figure out what a LEGO minifigure cost me per unit from a bulk lot?
Divide your total acquisition cost for the lot by the number of sellable units you extracted. Weight the allocation toward higher-value pieces if you want more precision, or use a flat per-piece rate for simplicity. Either method is better than assigning zero cost.
Is LEGO reselling worth it financially compared to other reselling niches?
From what experienced resellers report, LEGO minifigures offer favorable margin potential because they're small to ship, highly catalogued, and have a large established buyer base. Margins compress in common themes but can be strong in retired or hard-to-find figures. Check current BrickLink sold comps to validate any specific sourcing opportunity.
How often should I review my LEGO reselling P&L?
Monthly is the right cadence for most solo or small-team resellers. It's frequent enough to catch margin erosion from rising fees or shipping costs, and infrequent enough that it doesn't become a burden. Quarterly reviews miss problems too long; daily reviews add no signal over monthly ones.
Can I use a regular accounting app like QuickBooks for LEGO reselling?
General accounting tools handle the financial side well, especially income and expense tracking. What they don't do is help you identify or value your inventory. Pair a general accounting tool with a LEGO-specific inventory and pricing app like brick'em to cover both sides without duplicating effort.
What is the difference between profit margin and return on investment for LEGO reselling?
Profit margin is (sale price minus all costs) divided by sale price. Return on investment is (profit) divided by (what you spent to acquire the item). Both matter. Margin tells you efficiency per sale. ROI tells you how hard your capital is working. A high-margin item that took 18 months to sell may have lower ROI than a lower-margin item that turned in two weeks.
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