might as well try....
but i'm in the ditch it camp... and yeah, 500 is *all* you are going to get trade in, because who is going to try and spend the money needed to retail the car? they are stretching at 500, because they are really going to get scrap money. some dealers might just tell you to donate it and give you nothing...
if it drives alright, you might get 500 on kijiji as is from someone doing derby...
the car will not get better... it will continue to deteriorate.