If it's an old rust bucket you want, the Chevy Vega would corrode in the dealer show room when it was new.
Good luck finding a Vega that hasn’t already turned into a pile of iron oxide!
My first car was a 73 Vega. It had been my brother’s, and it did start rusting the minute he drove it off the lot. The steel oil pan never stayed sealed with the aluminum engine block, so it leaked more oil than a BP well. For some reason they put an air conditioner on it. If you tried to run it and came to a stop light, you had to put it in neutral and give it some gas or the compressor would kill the engine. I actually got a girl to go on a date in that heap, and while going around a corner, the passnger door flew open, almost ejecting her. She declined to repeat the experience.
The second car was a 72 Ford Mustang Mach 1. Much better, except Mrs. Henkster hated it. She was glad when it was stolen while I was at a Cub game at Wrigley Field.