That insight isn't worth 500$. Losing fluid means rusted brake/fuel lines, which is easily a 1,000$ fix depending on where you have it done.
Won't go into gear? Probably bad transmission. Minimum 1500$.
Battery is probably toast too, so that's another 2k.
I would give them 300$ for it, and I would just part the car out. Not worth fixing.
__________________
|