The rust doesn't look too bad to me. I've bought worse looking frame sets than that off ebay, although clearly I'm not a rust or engineering expert so only you can say if it's worth the risk or not to you...
You’re probably right. Most looks fine. It’s just a couple of shots of the rear BB shell (and tubes around it) on the purple frame that look a bit odd.
Edit: My potential stoker has pulled out also. So I think I'll pass on them. Shame, they're only 20 miles away down the A1!
The rust doesn't look too bad to me. I've bought worse looking frame sets than that off ebay, although clearly I'm not a rust or engineering expert so only you can say if it's worth the risk or not to you...