Lots of retailers provide discounts for sites like this to bring in business for them. Why don’t we put together a bunch of ongoing discounts for OT? Only issue I could see is that it may require an official representative of OT to set them up.
I know from forums elsewhere, places like DiscountTireDirect.com offer an additional discount. Basically they set you up with a specific rep that people would call to order and tell them they’re calling about the "Offtopic" discount. In the past when I’ve used the discount through them (Crossroads Online discount), I’ve saved another 10-25% over the prices listed on their site.