I have four 18" Lexus LS 460 OEM chrome wheels with Brigestone EL42 tires, some tread left, plus a new Bridgestone spare tire on a non-chrome alloy wheel. The chrome wheels are, I believe, an $1,800 each dealer option.
I would part with the four chrome wheels w/tires, plus the new spare tire sans wheel, if I can find a decent price for four 18" alloy non chrome wheels.