New (2000+) M3 rims are 18" or 19". The 17s are Replicas usually from FASTWHEELS. Good mags, I had them, just need to watch the finish on them.
Sounds like its a good one tho.. perhaps a compression test and leak down would be a good idea before forking over the money.
"If everything seems under control, you're just not going fast enough."
- Mario Andretti
1979 320is RiP
1994 318is Sold
1995 325is Sold
1995 530i Sold