Either he took those undercarriage pics to show it's really not rusty or he's pulling a fast one, thus the request for eyeballs, seems TGTBT. After your comments about Detroit I may just call it off. Every one trys to buy cars from where I live for a reason so I guess I'll wait until one comes up closer. This is a link for the 528iT, it definitely has some rust, but it's a 167k 1 owner if you don't count the used car lot
https://www.stanimports.com/mobile/mImagesAll.aspx?cmb=0|14665408|360140