I have a cheap compressor I bought at a yard sale for $50. It is just a 5hp old Craftsman with 20gal. tank. It works great for painting and will run my cut-off grinder. DA uses lots of air, so I can only go in short cycles. I tend to do a lot of manual sanding with a long body board, so this doesn't really bother me. I guess it depends on what you would use your compressor for.
