This is hilarious. Seriously, if you're the kind of person who even considers playing the 'consumer laws' card when dealing with 20 year old computers that have been sitting in a warehouse for 15 years, retro computing probably isn't for you.
FYI, the warranty seals on the bottom of all of the Amiga's were broken YEARS ago when the company went bust and the units were resold as dead stock, because a company that doesn't exist cannot offer a warranty. There is no scam or conspiracy here, they're just a load of old odd Amiga's, and some of them are bound to have issues after so long. If you're not willing to take that risk, buy a tested one from Amibay or something.