Method
Asking price or sold price? Why LEGO values disagree
Two people can look up the same LEGO set on two different sites and come away with numbers a hundred dollars apart. Neither site is lying. They are answering different questions, and most of them don’t tell you which one.
Two questions that look like one
“What is this set worth?” splits into two very different questions. What are people asking for it, and what have people actually paid?
The first is easy to find. Every marketplace shows you live listings, and averaging them takes seconds. The second is harder to get at, and it’s the one that matters when you’re deciding what to offer.
Why asking prices run high
A seller lists optimistically and waits. If the price is too high, nothing happens — and the listing stays up, visible, for weeks or months. Meanwhile every set that actually sells disappears from view the moment somebody buys it.
So what you can see is filtered in a specific direction: the listings still visible are, almost by definition, the ones nobody has agreed to buy. Average them and you get a number weighted toward prices the market has already rejected.
Every listing you can still see is one that hasn’t sold yet.
How wide is the gap?
Here are sets where we hold both numbers — the current asking average, and what the set has genuinely been selling for:
| Set | Asking | Actually sold | Gap |
|---|---|---|---|
| Yuletide Squadron Xmas-Wing Starfighter | $1,617 | $1,250 | +29% |
| AT-AT | $1,500 | $1,169 | +28% |
| Colosseum | $1,500 | $1,082 | +39% |
| Imperial Star Destroyer | $1,400 | $1,210 | +16% |
| Batcave Shadowbox | $1,320 | $1,071 | +23% |
| Firehouse Headquarters | $1,134 | $1,010 | +12% |
| Porsche 911 GT3 RS | $1,037 | $918 | +13% |
| NINJAGO City | $924 | $813 | +14% |
Across these, asking prices sit about 22% above what buyers actually paid. It varies enormously by set — a popular set with dozens of listings tends to be priced close to reality, while something rare with three optimistic sellers can be miles out.
The number nobody prints
There’s a second problem, and it’s quieter. A price averaged across forty listings and a price averaged across three look identical when they’re printed as a dollar figure. One describes a market. The other describes three people having a particular sort of day.
Almost nobody shows you which you’re looking at. We put the count next to every figure, because it’s the difference between a number you can act on and a number you should treat with suspicion.
What we do
We show both. The asking average tells you what you’ll face when you go looking, and the sold price tells you what the set is really trading at — currently on 4,516 sets and climbing as we work through the catalogue.
Where a set has enough completed sales behind it, that’s the figure our buy-below price is calculated from. Working back from an asking price would flatter every result, and the whole point of that number is that you can trust it.
Reading any price guide
- Check what the number means. Asking or sold? If the site doesn’t say, assume asking.
- Check the sample. A value with no count behind it is an opinion in a nice font.
- Treat asking prices as a ceiling. If you’re buying, you should be paying less. If you’re selling, expect to receive less.
- Be wary of precision. A figure to the cent, drawn from four listings, is a confident guess wearing a suit.
You can see both numbers, and the count behind each, on any set we track.