Skip to main content

Browse Build Collection Community

Buying opens soon. Browse the catalog and track prices now, or get notified the moment it goes live:

I plan to sell

← Small Train Engine Gray

How much is LEGO Small Train Engine Gray worth?

Set KT307-1

We don’t have a secondary-market value for this set yet. Check the set page for current offers.

The marketplace for collectors. LEGO first, with sports cards, Pokémon, and more on the same engine.

Browse

All themes & types
LEGO Sets
LEGO Minifigures
LEGO Parts by category
LEGO sets by year
LEGO sets retiring soon
Retired LEGO sets

Popular themes

LEGO Star Wars
LEGO City
LEGO Technic
LEGO Harry Potter
LEGO Ninjago
LEGO Friends

Values & rankings

What’s my LEGO worth?
Compare LEGO sets
LEGO value rankings
Most valuable sets
Biggest appreciators
Biggest sets
LEGO market index

Marketplace

Search the catalog
Auctions
Sell on CollectORbuild
Collector guides
Tutorials
Feedback & ideas
About & FAQ

LEGO® is a trademark of the LEGO Group of companies, which does not sponsor, authorize, or endorse this site. BrickLink® is a trademark of its owner; CollectORbuild is not affiliated with, endorsed by, or sponsored by BrickLink. CollectORbuild is an independent marketplace; product names and references are used for identification only.

Terms of Service Privacy Policy About & FAQ

© 2026 CollectORbuild · Catalog data and images from Rebrickable