Going price for used parts?

[Tom Tom Turbo]

I've got a few parts I may no longer need and I'm not sure what the going rate is. Any help is greatly appreciated!

Precision Vigilante multi-disk lock up converter 3000 stall with about 5k on it and maybe a handful of 1/8th mile passes.

206/206 billet roller cam with comp lifters and pushrods. About 2,500 street miles and a few passes.

What's this stuff reasonably worth? I don't want to rip anyone off but wouldn't like to lose my tail either.