This guide walks through how parting out actually works, how to calculate a set’s part-out value honestly, which sets are worth the effort, and the costs most people leave out of the math. It’s written from the seller’s side of the table, not the theory side.
What “parting out” actually means
Parting out means breaking a sealed or complete LEGO set into its individual elements - parts, minifigures, and sometimes instructions and boxes - and selling those pieces separately, usually on a parts marketplace like BrickLink or BrickOwl.
The appeal is simple: the sum of a set’s individual parts is often worth more than the set sells for as a whole, especially once a set retires and the sealed-box premium hasn’t caught up yet. A $60 set might contain $140 of parts at guide price. The catch is that “guide price” and “money in your pocket” are two very different numbers, and the gap between them is where most of the decision lives.
Is parting out worth it? Parting out vs. selling sealed
Before you part anything, ask whether you should. The same set can be more profitable sealed than parted, or vice versa, depending on a few factors:
- Part out when a set has high-demand parts (new colors, large or specialized pieces, popular minifigures), when the set is common enough that sealed copies won’t appreciate much, or when you need faster, more frequent sales rather than one big payoff.
- Sell sealed when the set is a known future grail (licensed themes, modulars, large display sets), when it’s already retired and climbing, or when you simply don’t have the time and storage to manage hundreds of new lots.
A useful mental model: parting out trades one easy sale for many small ones. You’re taking on inventory management, storage, and slower cash conversion in exchange for a higher theoretical return. That trade is worth it constantly for the right sets, and a quiet money-loser for the wrong ones.
How to calculate a set’s part-out value
This is the step that makes or breaks the decision, and it’s where most sellers fool themselves.
Use BrickLink’s Part Out Value tool as your starting point. Enter the set number and it estimates the total value of every part and minifigure based on the price guide. That’s your baseline, but read it critically:
- Average vs. current, sold vs. listed. You can value a set against items currently for sale or the last 6 months of actual sales, at average, minimum, or maximum price. Value against the last 6 months of sold prices, at average, not the “currently for sale” maximum. Listed prices are what sellers hope to get; sold prices are what buyers actually paid. Optimistic sellers quote you the former; realistic ones budget with the latter.
- New vs. used. Make sure the tool is set to the condition you’ll actually sell in. New-condition part-out values are higher, but only if you keep the parts genuinely new (unbuilt or carefully handled).
- The reality discount. The tool assumes you’ll eventually sell every part at guide. You won’t, or at least not soon. A realistic seller discounts the raw part-out number by a meaningful margin to account for parts that never sell, parts that sell only after deep discounts, and the fees and time below. Treating the raw number as your return is the single most common parting-out mistake.
Then sanity-check against velocity. A high part-out value made up of thousands of one-cent common parts is not the same as a moderate part-out value concentrated in a few dozen in-demand lots. Demand and how fast pieces actually move matter as much as the headline total.
A simple buy-side rule of thumb Don’t buy a set to part out unless its realistic part-out value is a healthy multiple of your all-in cost, enough to absorb fees, time, and the pieces that won’t sell. Many sellers won’t touch a part-out unless the numbers clear roughly 2-3x all-in, or the set is deeply discounted off retail. If a set only pencils out at guide-price perfection, it doesn’t pencil out.
If you’d rather not run this by hand, my free part-out value calculator does the fees, multiple, and ROI math for you and gives you a buy-or-skip read in seconds.
The costs nobody puts in the calculator
The part-out tool shows gross value. Your actual return is what’s left after all of this:
- Marketplace fees. BrickLink charges a sales commission on a sliding scale (a few percent, lower as your monthly volume rises), and you’ll pay payment-processing fees on top. BrickOwl’s fee structure differs. Budget for both.
- The pieces that never sell. Every part-out leaves a long tail of common bricks that sit for years. That inventory isn’t worthless, but it’s not the return the calculator implied, either.
- Time. Parting out, sorting, listing, and picking orders is real labor. A set that “profits” $40 but takes two hours to process and a year to sell is paying you poorly.
- Storage and capital. Every parted set is physical space and cash tied up until it sells. Scale that across dozens of sets and it’s a genuine constraint, not a footnote.
- Minimum lot friction. Tiny-value lots cost the same time to list and pick as valuable ones, but return pennies. Many sellers set a floor and skip or bulk the lowest-value parts entirely.
None of this means don’t part out. It means part out with these subtracted, so the sets you choose are the ones that still win after reality.
Step by step: parting out a set
- Evaluate before you buy. Run the part-out value, discount it for reality, subtract fees, and compare to your all-in cost. Decide then, not after the box is open.
- Acquire at the right price. Your margin is mostly made on the buy. A great set bought at a mediocre price is a mediocre part-out.
- Part it out in your inventory tool. Use BrickStore/BrickStock or Studio to generate the full parts list from the set number, then import or sync it into your store. This is where a good tool saves hours over entering parts by hand.
- Price against sold data, per marketplace. Price to the last-6-months sold average, and adjust per platform so each marketplace’s fees don’t quietly erode your margin. (BrickLink vs BrickOwl covers where you sell it and why the fees differ.)
- Sort and store so you can actually find things. A part-out you can’t pick efficiently isn’t profitable no matter what the guide says. Consistent storage and location tracking is what separates a sustainable operation from a garage full of unsold bricks.
- List, then manage the long tail. Reprice slow movers periodically, bulk the dregs, and keep your inventory honest across every channel you sell on. As the lots pile up, managing a growing parts inventory becomes its own skill.
Mistakes that quietly kill your margin
- Trusting the raw part-out number as your return instead of discounting it.
- Pricing to “currently for sale” maximums and then wondering why nothing sells.
- Parting out grails that would’ve earned more sealed.
- Ignoring velocity and tying up cash in slow inventory.
- Underpricing your own time so a “profitable” part-out actually pays below minimum wage.
- Letting inventory drift out of sync across marketplaces, so you oversell or lose track of what you have.
FAQ
Use BrickLink's Part Out Value tool: enter the set number and it totals every part and minifigure from the price guide. Value it against the last six months of sold prices at average, in the condition you'll sell, then discount for the parts that won't sell and the fees you'll pay.
For the right sets, yes - sets with in-demand parts or minifigures, bought at a good price, that are common enough not to appreciate much sealed. For future grails or sets you can only sell at guide-price perfection, selling sealed is often better.
Either can work. New-condition parts command higher prices but require careful handling to stay new. Used part-outs, from bulk or opened sets, have lower per-part value but often a much lower buy cost, which is where the margin comes from.
The valuable lots can move in days to weeks; the long tail of common parts can take months to years. Plan your cash flow around the fast-moving lots, not the total.
At minimum, an inventory tool (BrickStore/BrickStock or Studio) to generate parts lists, and a marketplace store on BrickLink and/or BrickOwl. As you scale, tooling that keeps inventory synced across channels and helps you spot which sets are worth parting saves the most time.