[blau911]

Depends upon if they need to be resurfaced or not. If they are cores, they are worth maybe $600. If they are in good usable condition, more like $900-1000.
Webcam can cut just about any cam profile you want for around $5-600. I haven't needed cams in a while but that was around the going price 5 years ago.
Add a few hundred more in worth if they have the MFI drive. I could be a little high in my estimate, but these prices shouldn't be far off.