Discounts are EXTREMELY hard to come by on suites (and I believe the higher-end suites are never discounted), but discounts on smaller, less expensive suites are occasionally available. I got AP rates on our "Honeymoon Concierge Room" at the Grand Floridian (it's in the main building concierge, but not technically considered a suite) and on our "Garden Suite" at the BoardWalk Inn. It was during value season, and I wouldn't count on a discount, but for certain rooms it can sometimes work out.