This roller popped back up for sale in NJ. I think it has floor pan rust, it'd be an afternoon fix for you. Probably battery box and a few other areas but it's all easy for someone with any fab skills.
Comes with coilovers and is latemodel. Bet you could get it CHEAP cuz he's paying storage on it.
The worst rust spot on an e30 is probably rear spring perches but I've done them and they're not even that bad. Towards the end of the thread he claims it's just floor rust which is easy.
https://www.r3vlimited.com/board/sho...d.php?t=361964