Nice looking wheels. You might have better luck selling them by posting them on www.firstfive.org or mye28.com. These days not too many people are looking for 15 inch wheels but for the olders cars firstfives is for e12's there may be a market. The other thing is without the center caps they aren't worth as much. Maybe I got a good deal but I bought a set like yours for my e28 for $200 including center caps and 4 tires 2 good 2 worn out.
Craig in Davis
89 535i auto to manual conversion
Delphin-Metallic/Black leather 296k
83 533i 5 speed Alpinweiss/Cardinal Red leather 236k