Hi Sheri!
My wife and I are bargain hunters, and I can say, there are
zero discount shops at any of the parks or resorts. You may occasionally see some seasonal marked-down products, but for the most, everything is set at that premium Disney rate.
My recommendation: Unless there's a specific item that is official Disney Parks merchandise that you want to purchase at Disney World (and even then, you can get some of these off DisneyStore.com), I would just go to retail stores that carry official Disney licensed merchandise, at a fraction of the cost. JC Penney and Target are two I know my wife has used in the past for Disney apparel.
But I need to mention Disney's online store,
DisneyStore.com . They generally offer various discounts throughout the year, so be sure to check there also. I know it may not be the same as buying at the actual park, but for us, on occasion money savings trumps experience :-)
Good Luck, and hope you find everything you need, at a cost you like!