airbrush compressor advice

[mpg200]

Hi Im hoping someone will be able to advise here. I've been using and airbrush for painting my shells for years but i've only ever used the cans of 'air' instead of a compressor. Now ive got right proper fed up with the cackness of these cans so i thinking of getting a small compressor. so what is good one for the guy who paints probably only 6 or so shells a year? ive seen some cheapy ones on ebay but i just dont believe they could be any good...
cheers
Matt