Think Geek e-shop sells T-shirts with real playable music sinthesizers with professional quality sound on them. Nr. 2 
Atypyk e-shop offers a very weird T-shirt design that can be a perfect visual material to study human body's anatomy. Well, the upper part of it. The price is quiet high, but it;s definitely worth it! Nr. 3 
Youngprimitive Czech fashion shop plays with a theme of terrorists which is extremely popular nowadays. Designers have a great sense of humor and know how to make an attractive clothing using the very minimum of design techniques. Nr. 4 
An artist and designer Dave Rittinger offers a unique concept of how to become a part of moribund autumn nature – T-shirt made of colorful autumn leaves. Seems like a great green business idea! Nr. 5 
The mountain retail store came up with a wide range of animal face T-shirts. Choose from wolf, bulldog, gorilla and other faces to release the beast inside you! Visit Unique Business Ideas http://www.lowbudgetprosper.com