Most LEGO Sets Lose Money. Here's How I Find the Ones That Don't.

Discount depth gets the attention. It's only one of seven things I actually look at — and on its own, it's the weakest signal of the bunch.

The dirty secret of LEGO investing is that most sets aren't investments. They're toys you paid retail for.

Pull up any collector forum and you'll find a version of the same story: someone bought a $250 Star Wars set in 2023, watched it sit in their closet for three years, and now they're trying to sell it for $260. That's a two percent return over thirty-six months. They could've put the money in a high-yield savings account and done better without the dust.

The sets that actually appreciate are a minority. Maybe one in five at the high end. And the reason they win isn't theme or rarity in isolation — it's a stack of signals that line up at the right moment. I built the Stud Score to grade those signals together, so you stop gut-feeling it every time you walk past an endcap at Target.

What the score is

The Stud Score is a number between 50 and 100. Higher is better. Anything above 75 I treat as a real investment-grade buy. Anything under 65 I treat as a toy purchase, no matter how cool the box looks on the shelf.

It's not a magic number. It's a rollup of seven inputs I'd otherwise check by hand before buying anything serious. Putting them on one scale saves me about twenty minutes per set and keeps me honest when I'm tempted by something I want but shouldn't actually buy.

The full math stays behind the curtain. The score doesn't — that's the whole point.

The seven signals

These are what I'm actually checking, in rough order of how much weight each one carries.

01 Is it retiring soon?

Sets within twelve months of retirement have the strongest appreciation curve. Once a set's pulled, supply drops to whatever's still sitting on eBay and BrickLink. That's the moment prices move. Everything else is anticipation.

02 Are the minifigs exclusive?

A Cal Kestis fig from the Mantis set trades for about $53 on its own. A Brian O'Conner from the Skyline Speed Champions set runs around $40. If the figures inside the box are worth a quarter of what you're paying for the set, the math still works even if the rest of the bricks never appreciate.

03 Is the price already moving?

I look at the spread between asking price and actual sold price on eBay over the last ninety days. If sold prices are climbing while listing prices stay flat, that's the early signal. The smart money's already in.

04 Is the theme strong?

Star Wars, Harry Potter, and select Icons sets have decade-long buyer bases. Niche themes don't. A weak theme can still produce a winner, but the floor is lower if it ends up flopping. The theme is the safety net, not the upside.

05 Is the entry price a real discount?

This is where most people get fooled. A 10% discount on a set that historically appreciates four percent a year is mostly noise. A 30% discount on that same set is real alpha. I weight depth-of-discount heavily — and shallow discounts heavily against you.

06 Has the set already had its run?

Some sets have already moved forty percent above MSRP. The investment thesis is gone — you're paying for someone else's gains. Stud Score penalizes sets that have already cooked.

07 Is the part-out value reasonable?

Even if appreciation stalls, parted-out sets often clear retail through BrickLink piece sales. That's the floor under everything else. If a set has a strong part-out, your downside is capped.

I don't need all seven to fire. Four hitting is enough. Five or six and I'm buying without thinking twice.

A worked example

Take two sets I scored this month.

The Speed Champions Nissan Skyline (#76917) came in at 80 — Strong Buy. Brian O'Conner is an exclusive minifig that adds about $40 of value before you open the box. The set is on Amazon at 30% off MSRP. It retires this December. The theme is hot. Five of seven signals fire, hard.

The Mona Lisa (#31213) scored 58 — Skip. No retirement timeline. No exclusive minifig. The Art theme is soft. Sold prices on eBay haven't moved in nine months. The discount is shallow. One signal fired, weakly.

#76917

SKYLINE GT-R
Speed Champions

STRONG BUY

#31213

MONA LISA
Art

SKIP

Same evaluation framework. Wildly different result. That's the point — you stop guessing and start grading.

How to use it

Every set on Brick Tracker shows its Stud Score next to the deal data. You don't pay for it, you don't sign up for it, and you don't need to know the math. Just check the number before you check out.

I scored my own collection with it. Here's what twelve months of buying-by-the-score actually looks like:

My Personal Portfolio · Last 12 Months

$1,177 → $1,432 +29%

Live numbers, updated hourly on the dashboard.

That's the return on sets I bought after Stud Score told me to. Compare it to the flat-to-slightly-positive average for sets I bought on vibes before I had a system. Math beats vibes — every time.

If you want the daily curated pick scored and ready, the email list is the fastest way in. One deal a day, scored, free. The signup box is at the top of this page.

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If you're standing in front of a Target endcap right now trying to decide on a $200 box — that's the moment to open the site. It takes longer to read this paragraph than it does to get a verdict.

Most LEGO sets lose money. Here's the system I use to find the ones that don't.

What the score is

The seven signals

A worked example

How to use it