LEGO 42115 Lamborghini Sián FKP 37 (new, sealed) typically costs $21.61 less than LEGO 42083 Bugatti Chiron (new, sealed) on eBay right now ($548 vs $570 median asking price, item + shipping). Per piece, LEGO 42115 Lamborghini Sián FKP 37 (new, sealed) is cheaper: $0.15 vs $0.16. Prices from filtered US eBay listings, checked twice a day; asking prices, not sold prices. How we price.