I've got a used NorthStar Electric Air Compressor, 2 HP, 20-Gallon air compressor. It's been in service since 2013, but has only been used a few hours per month (if that). Probably needs to be drained, otherwise, it works just fine (I am selling it because I bought a silent air compressor). The cheapest I've found online is $700, so I'm parting with it for $250/OBO.
More info:
2 HP, 115V/230V, 15/7.5 Amp dual voltage induction motor
2-cylinder cast iron single-stage pump
Delivers 5.0 CFM @ 90 PSI; 6.0 CFM @ 40 PSI
Comes wired for 115V operation with a 6ft. cord and plug
Full specs here: https://www.northerntool.com/products/northstar-single-stage-portable-electric-air-compressor-2-hp-20-gallon-5-0-cfm-vertical-25653
Located on the ground floor. I can't help you load it. Probably needs to be transported vertically.