Need help from the parts pro's with rare parts values

[StingRay]

Parts are not for sale and I am not soliciting offers but I am trying to establish values on a few parts I have that I may be selling or trading in the future.

I have one mostly complete 68 cruise control that is less brake light switch and has a damaged brake vac valve. I have no idea as to the operating condition of the critical components and the cosmetic condition is by no means mint. The rest is all there including the wiring, lines and cable from speedo to servo.

I have one NOS pass rear wheel arch and one back of the wheel arch trim pieces for a 68 LWB.

I have one CST style E-Brake cover.

So seriously guys and gals. Some of you are in the know as to reasonable market values for this stuff and eventually I'll arrive at it on my own but I'd really love to get a few tips here from the pro's