I did exactly that. Went shopping for a 330i that was advertised and saw a very sad looking Supe out the back with most of the interior on the back seat! Flat tyre, flat battery, flat paint but I swear she smiled and winked at me as I walked past. Quick conversation and a (very) small amount of cash later, I'm the proud owner. Since then, modest amounts spent on second hand parts, lots if time and love and I have a very respectable looking 90's super car.
Bit like a rescue dog really, just needed a new loving home. Everyone household should have one (and no fleas or worming to deal with)!