www.shoppersrule.com sometimes runs die sales for the Go! Might want to get added to their email list. This is a place where you can submit a bid on an item and they will either accept it or counterbid (which you can reject). Some people have started by bidding less than half price for something; when rejected, they bid a little more the following week and keep doing that until they get the rock-bottom price. Shipping can be high, though, and they run free shipping sales only twice a year or so.
Also, there is an Accucutquilters group on Yahoo with some business posters who give discounts.