What's It Worth? Rear A/C setup in 89 burb

[Old Chevy Lover]

I just got an 89 Suburban that is pretty much ragged out. I'm just planning on using it to pull a dirt track car to a local track and was thinking of selling some of the parts off of it that I don't need. One is the rear A/C unit. It is still hooked up with the switch on the dash (seems to run when switch to 'hi' but not 'low'). The A/C stuff is missing under the hood. I was just wondering what the setup would be worth?

[Bob Gervais]

Not sure, but I need the lines that connect at the middle of the truck, and go to the rear. They're the metal lines, not the rubber ones. If you decide to sell the parts separately, let me know.