Make a reasonable offer.
This is one of the rear (17" x 8.5") rims that comes with the E90 325i sport package. This rim has only about 800mi on it and it is perfectly true (not bent or anything like that). To make a long story short, I had this rim refinished after a minor curbing incident on the edge (2" long scrape). The curbing was fixed perfectly but the applied finish isn't as good as the factory job. I ended up just buying a new wheel b/c I don't want to deal with it.
This one is perfect for a spare or snow use. Or... you could get it refinished better yourself and still come in ahead of the price of a new rim.