Ok, after checking eBay and Craigslist and some other sources, I've
decided I'd rather get a new compressor that is delivered to my door (or
in the case of Grizzly Freight, my driveway). So given that I need about
20 CFM @ 100psi, and trying to save a buck, is there any reason to NOT
go for this Porter Cable compressor:
http://www.grizzly.com/products/H3719

as opposed to this Campbell Hausfeld compressor:
http://www.grizzly.com/products/G2815

The PC is about $160 less delivered.