I have not come accross any that will do that small of a quanity, but I have found some that will do like 500. The best quality I have found, and they do not mind adult at all, is www.psprint.com.

We usually do very large postcards rather than 8x10 photos or flyers because I really like the postcard stock for autographs, etc. I think you can get 500 of them for under $150 with shipping.

It is all automated on their site, so just play around with different papers, printing options, etc. until you find the price/quantity you like.

Hope that helps.