I think it might be more fruitful to describe the scope of your project more. 500 for something like a complete walk sheet and various attack animations sounds good, but I don't know if that is what you're looking at.
If you're looking for something more complicated like a frame by frame animation, 500 migjt buy you ~two or three minutes, if you get lucky.
It's kinda hard to really tell without the full context, so I say just post and see of anyone bites.