While the cheapest sets created by legendary Danish toymaker LEGO cost as little as $5 (£4), there are plenty of wow-factor creations that retail for astonishing sums.

From iconic models of the Titanic and Eiffel Tower to coveted Harry Potter and Star Wars projects, read on to discover the 28 most expensive LEGO sets ever, as compiled by collectors' website BrickEconomy and ranked by their original US retail price. Where a set has been retired by LEGO, we've also included its current value, which is often substantially higher than the original price!

All dollar amounts in US dollars. Prices correct as of October 2026.

The most expensive LEGO sets ever and what they're worth today