well some people ask that much for just the caps.
Condition of the rims will usually drive the seller to ask pretty low; rash, dents and bends are not good for top price. If they really are 15" they are from an iX and have a high offset(et41), so getting spacers might make them more palatable on a RWD e30.
Its not easy to tell the condition from the pics but I would say cheap, but not exceptionally cheap.
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