Question about value of rare? parts

[kxnomore]

I've been trying to sell my 72 C-10 highlander with the factory 402, etc for over two weeks with no luck. Even at $1500 it's not moving, so something's not right with this economy. So now I'm thinking it may be time to part out the more valuable items, and drop the price accordingly, but I'm really not sure what the going rate is for the parts listed below, and I'm hoping some of you all can help me out:

Dealer installed cruise control with the correct switch, and the dual throttle cable setup.

Tilt Wheel

402 smog pump (complete and working)

Auxiliary battery tray

402 AC Brackets

72 clamshell motor mounts

402 heat shield on firewall

Sorry I don't have any pics on this computer, but this isn't a for sale thread anyways, I'm just trying to get a good idea of the approx range of value to help me decide how to get my investment in the truck back. Thanks in advance!