I'd check Craigslist. I bought a used 15 gallon compressor about 5 years ago for 20 bucks. My Dad had two used compressors that he bought second hand that lasted for 20 or so years.

I have three compressors and more often than not, my small 15 gallon gets fired up more than any of them. If you're doing small things like airing up tires and ext., it works great. Just fired it up today to blow off a carb.