Hey Vette,
A few thoughts I have as a fellow shopper:
* I fully expect the owner of ANY vehicle would never consider that the engine compartment shouldn't be greasy & dirty (multiply by 10 if the owner is a professional mechanic.)
* A leather 10-year-old driver's seat & steering wheel will need to be recovered and should be in the budget if that's important to you.
* MANY people don't even wash their cars. Only .00000001 percent who have vehicles with lower plastic cladding have a clue that it can easily be "restored" from light gray to factory awesome. YOU will have to do that yourself.
* Everybody thinks their crappy vehicle is worth it's weight in gold.
Don't give up, buddy!