If you are gonna copy ARPG item tiers, do it right.
They could also add a Unique tier, but that would have a limit of 1 per customer.
My gradfather used to drive a Fiat 128 (Centoventotto) in the late 60ies - early 70ies.
Legend has it that my uncle drove that to Norway (from the south of Italy) on his honeymoon trip.
I've lost track of it, but i remember it was still in use in ~2008 or so, today i think it should be somewhere at my uncle's place.