I have been trolling Clist for 3-4 months now for a compressor and finally found a deal I couldn't pass up...
I just paid $50 for 80 gal. w/ 2 stage Speedaire pump and 7.5hp 3ph motor (23cfm @ 150psi). Searched Clist and found a 1ph 7.5hp motor (list $150 - pd $100) to enable use at my home. It came with a radiator style dryer too.
Nothing's perfect... Horiz. tank.
Tank was new in 2003 and cert. to 175psi.
It even has nice 6" HDuty casters welded to feet, 2 locking.