You don't need an afternoon and a spreadsheet to find out what your old LEGO is worth. Here's a genuinely five-minute way to check, step by step.
Minute 1: Gather it into one place
Pull everything into one pile or box — tubs from the loft, the bag under the bed, whatever's scattered around. You don't need to sort it, just get it together.
Minute 2: Pull out anything sealed
Sealed, never-opened sets are worth the most by a wide margin. Set these aside — they'll be valued individually rather than lumped in with the rest.
Minute 3: Spot any complete sets you recognise
Look for sets that are still mostly or fully built, or bagged together with their pieces. You don't need the box or instructions — just note the set name or theme if you know it (Star Wars, Harry Potter, Technic, City, and so on).
Minute 4: Round up the minifigures
Check pockets of the pile, the sofa, old toy boxes — minifigures are small, easy to lose, and often worth more per item than the bricks around them. Any you find are worth flagging separately.
Minute 5: Weigh what's left
Everything else — the loose, mixed bricks — is valued by weight. Standing on bathroom scales holding the tub, then subtracting your own weight, is accurate enough for this.
Now get the actual number
With that done, you've got everything you need: any sealed sets, any complete sets you recognise, any minifigures, and a rough weight for the rest. Enter that into an instant online valuation and you'll have a real, current price — not a guess.
Get your instant LEGO valuation →
What if you're still not sure what you've got?
That's fine — you don't need to be certain. Give your best guess on set names and weight; if something's misidentified, it's sorted out properly once it's received and checked, before anything is finalised.