1. whats this setup worth if I was going to sell it?
Those are Sony xplod 12" 1200watt with a Sony 1200watt amp. The box is 3/4 high density fiberboard covered in spray on bed-liner.
2. What would be a good pair of 8" subs and amp that would have a good rich sound that is reasonably priced to do something like this with.
http://forums.pelicanparts.com/showthread.php?t=354219&highlight=subwoofers