I'd recommend saving your money, and putting it towards that 1950 Chevy Coupe you have in that other thread. You will NEVER get your money back if you blow it on this (essentially worthless) Omni. At least with that 50's coupe, there will be a decent return on investment since it has such a heritage with you. If worse comes to worse, you can sell it and make money on it, with the Omni? forget it. You may as well be lighting a match to quite a percentage of every dollar or minute you sink into that thing.
If you were to put the $500 and your time towards restoring that coupe, I think you'd be quite a bit happier in the end (as well as on behalf of your parents) then neglecting that car and tossing your valuable money trying to make a worthless car, worth something.
Dont get me wrong, I'm sure it would be fun in the end.... but its just not practical or financially smart.
"The music business is a cruel and shallow money trench, a long plastic hallway where thieves and pimps run free, and good men die like dogs. There's also a negative side"