I've added the custom Hogwarts Live T-shirts and other custom merchandise branded primarily with the Hogwarts Live crest to three more stores. I did this cause some people complained that the prices at Zazzle were too expensive. The Spreadshirt store is the the cheapest if that's what you're looking for.

Right now the cheapest men's T-shirt currently available is:
$9.99 (USD) - Hogwarts Live Crest Value T-shirt

You can get a women's shirt for as low as $11.40 (USD) at Spreadshirt.

On Spreadshirt both sexes have access to wide array of colors, you can browse by:
Design or Category: Women - Men - Kids - Classic T's - Favorites

There are also a lot of inexpensive items such as stickers and pins within the various stores.

The current stores you can buy custom Hogwarts Live merchandise from are as follows:
Zazzle Hogwarts Live Store - most designs and customization options
Spreadshirt Hogwarts Live Store - lower prices + tons of colors + all designs
CafePress Hogwarts Live Store - limited to HL Crest designs only
Printfection Hogwarts Live Store - another alternative + more colors

UPDATE: 15% OFF T-Shirts and More on Zazzle - Use code: ZAZZLEFORYOU

Remember when looking at shirts what you see is what you get so make sure the images don't look fuzzy on the preview or stretched before you order. All Zazzle and Spreadshirt items should be pretty much perfect as I was able to fine-tune image sizes on each item within those stores.

Please check out each store for a variety of products and prices.

Thanks!