Jorge Ortiz is a fantastic graphic artist from Spain, he's made these super fun silkscreen prints himself, they're 8"x10", AND they even glow in the dark. Plus they're €10 a piece or €25 for the two of them in a portfolio folder, which is a pretty sweet deal. I have the portfolio set of these and they're super well done.
To order just paypal firstname.lastname@example.org, it took me about a week and a half to get my prints from him in San Francisco.
ps, the prices are all in euro which I can't seem to get working for me tonight. I'll fix the entry soon.