J!NX is a popular site that caters for gamers with a focus, it appears, on World of Warcraft. I've ordered T-shirts from there (The cake is a lie!) and they're good quality from a reputable company.
From the FAQ section:
All shirts, unless otherwise specified, are sale-priced at $7 off.
All sweatshirts (pullover or zip-up), unless otherwise specified, are sale-priced at $15 off.
Talking Plush Murlocs are priced at $25.
The promotion will run from 4/5/10 12:30PM EST until 04/09/10 11:59pm EST.
This offer is not valid in combination with any other offer or listed sale price. You are welcome to use any other promotion, but that will override this promotion, so figure out which one will work better for you. You can try putting in a code, and if you find that the "Super-Colossal Sale" offer will work better, you can use the REMOVE PROMO button.
No dota shirts.. what the f*ck..