I needed to get a compressor in a hurry, there were a LOT of them listed on craigslist.org. I was amazed. I wrote to three of them, none got back to me in time, I needed it NOW. (I was changing my furnace and wanted to blow out my A coil).
Search "compressor" on craigs list, and theres a lot, compressors are one of those things that many people don't use much and they sell them in great condition. Half the ones there looked brand new.
I bought a 200 dollar 15 gallon compressor at Wal-Mart, a decent thing, but the deals looked better at Craigslist.org (I wanted one that would fit in the back seat of my Camry too).
Reading reviews everywhere, there are a lot of people that say their new compressors gave them problems, so be careful if you get it used.
Going 220Volt, you can certainly get a much more powerful one.
Here's a quick search for San Diego, there are a couple in Oceanside, a search "oceanside compressor" shows them.......
classifieds - craigslist