The strength of the metal and the way they are heat treated makes a huge difference. I would be a bit concerned with eBay wheels.
I thought that most BMW wheels made in Italy are by crommadora, who have been making alloys for years. Unfortunately the also made a batch of 225's that were prone to crack.
There is a 18" BMW performance wheel that's forged IIR and it is nearly $4k
Last edited by mmmmQuattro; 12-14-2012 at 10:49 PM.
Reason: 225's not 230's