Everytime I've gone to World of Disney at DTD, there have been sale items. Once it was fleece pullovers, another time it was golf polos, etc. The "sale" signs are small so you need to be on the lookout. Maybe ask the CM greeter as you enter.
We went the week before Christmas one year and they were really marking down the decor stuff. We were at FW and they had stuffing sitting outside the trading post. I bought a bunch of stuff but I can't remember the percent it was marked down. It was good though.
I got Christmas ornaments on sale last December at the Christmas shop in Downtown Disney. They had sale items as well as some clearance items. Also hit a good sale at the Lego store...
The WDW Resort stores have On Sale items.
At WL I found colorful Pooh Pasta on sale.
At ASMusic we found several items including a Mickey shaped Coin purse,and a WDW Castle with the Fab 5.
At the Parks in the shops Ask for Sale items,the will direct you to those items.
I've had my best luck on the sale racks at that big store in Future World. Better luck with adult stuff than kids stuff - but some luck with kids stuff as well.
I always check out the sale racks. And there is a sale rack in almost every large store. Find the biggest store in the park.
I've bought stuff on sale at the resorts as well - but the selection isn't as good.
Mouse Works in future world at Epcot! I always find great sale items there. I got a great leather coat with mickey on it for half price this past February. I also got all kinds of sale t-shirts for the family back home. I've found stuff on sale there my past three trips. It's also one of the larger shops I've seen. I seems like because they have so much stuff there is a larger % of it on sale. Good Luck on finding the bargins!
I am known for looking through the shops, for that famous red sticker on the tag, meaning it's on sale. I just returned from WDW last week, and I only found one thing on sale, I was so disapppointed. It was a fleece throw. I usually can find stuff at the various resorts, in the parks and at downtown disney. So, I guess it's a hit and miss, and I surely missed it this trip.
In 2001 I got a couple really nice pairs of PJs on sale at Pooh's Corner in DTD. When I went back in 2002 I found another pair also on sale. (Needed a new pair having lost 75 lbs between trips.) Found some shirts for my girls on sale and my DH found a fleese jacket on sale at World of Disney I think.
So sales are there.