I found a Fairchild Channel F on CL. Below is a direct copy and paste of the listing:
Fairchild channel F, have original bill of sale from 1978 w/ warranty card, booklets for all games, 6 games 1,2,3,10,11,12.
Great condition works awesome
Seller is asking $50. Is it worth it? I don't see many completed auctions for loose consoles on eBay, nor have I ever come across one before.