Sportsman's Guide has had some pretty good pre-season prices, but a more limited selection. Not exactly sure how good the quality on the store brand is, but I'd risk that over an off-brand Amazon purchase any day.
Most of last season, Fleet Farm had a fair price on their larger hub shelter. I've got the smallest (1-2 man-really a 1 man) uninsulated and mid-sized 2-3 man (2 men reasonably comfy) insulated.