JoAnns does periodically have sales on AccuQuilt products, but they also have a limited selection. Still, a great way to kick start your GO! dies and accessory collection. Quilt in a Day online also has a pretty good collection at a good price, plus they will periodically have sales throughout the year:
http://www.quiltinaday.com/shoponline/accuquilt.asp and I Have a Notion has a few dies at a great price too, just do a search on AccuQuilt.
http://ihavea-notion.com/store/item_...Ricky-Tims.htm