I was recently looking at swapping my Lexus IS200, 51 plate for a Mercedes CLK230 supercharged of the same year, i know these can suffer badly with rust but the person assured me that it only had one small patch by an arch. Well after driving a lot of miles, the car had rust on every arch as well as the cills, but it was when i got into the car that i realised how nice my Lexus was, the wood looked so cheap and shiny, like plastic... some of the things inside didn't work and there were gaps everywhere, you'd close a panel in the centre console and you could slide pound coins through them.
Then i took it for a drive and it felt like it had been smoking 200 bensons a day for 50 years...
Considering this car was like £40K or more new, it was shocking and i could not wait to get out and back into my Lexus, it felt like bloody heaven ;-)