Who is going to print them up for you??? When I had the tee shirts for my Coffee Shop printed up I was able to get them for about $8-11 each. All I had to do was give the guy a picture of the logo and in 3 days I had 20 shirts.
When you get them done put me down for a couple
There's a place here in Oakland that's an offshoot of Graphic Visions, a company that I've had some shirts and signage done at in the past. I could probably save some money getting it done through one of the online companies, but for something like this, it's probably better to have it done locally through somebody you can work with personally, which holds true for many things.