So if its water damaged u could still use it?? And what do u mean flushed? Also how do u kno if its fully dry?The engine is worth a thousand or more, same for the tranny. Anything else you sell (interior, front end pieces) is gravy.
Water damage cars are going to be harder to sell as parts, but easier to sell as a full car if you intend to repair it. Just don't run it or hook a battery up to it until its drying and the things have been flushed.