I've had the best luck with Contests on Freelancer. I usually drop $25-$50 per piece of art I need (logos, mascots, icon sets) and usually get around ~30 submis

I've had the best luck with Contests on Freelancer. I usually drop $25-$50 per piece of art I need (logos, mascots, icon sets) and usually get around ~30 submissions, of which at least half are solid quality. You just pick your favorite and that's the one you get for the price.