I thought i was getting bent over at $40 for a used, non-refurb'd corny!
I'd advise you just go through brewer's discount. can get 2 cornies that are washed, pressure tested, but need new o-rings (at least dip tube o-rings) for $34 plus shipping, which'll run about $15 (that's what I paid).
its a way better deal. I think their re-furb'd cornies are in teh low 20-dollar range, so you could still get two perfect cornies plus shipping for the cost of 1 local corny that might not be re-furb'd yet anyways.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10