I am a real fan of plain simple graphic tee’s and have just come across a great T shirt label called I Love Boxie.
They have tons of slogan tees all in a typewriter type style. Each slogan has a story behind it and they even have a service called T Spoke whereby you can tell them a story that you would like on your T shirt and they will come up with a line and make it up for you. This service is £32 or $44.
For a regular T Shirt from their catalogue they charge £23 or $32.