If it was me who found those bikes, I would see If I can get them up and running for cheap by just getting the minimum like tires, chain, brake pads, etc. one I got them working I would sell them to a college kid that needs a beater for getting around campus.

If your looking for a bike to ride, pick the one that fits you best and has the lease damage from sitting around and go for it!

another option is to completely strip down to the frame and sell it someone looking for a fixed gear project. You'd be surprised how much a frame with horizontal drops will get these days. You'll get more for a frame than a bike in non-working condiiton.