Not trying to thread jack, but I'm in the same boat. Was told might be the clutch or some sort of wiring gone bad or loose. If it's clutch, is it possible to just replace that instead of the entire compressor?
Is there a reason why you suggested used over a new one?Make sure it's not the wire harness that plugs into thermal switch. Mine is plugged in but won't turn on unless I wiggle the wire. So I fixed it with a zip tie lol.
If your going to buy a compressor, buy a used oem one here. They are a honda acura only junk yard! They also have a ebay store.
East Park Auto Recyclers
Good luck.