Try SkyAuction.com for a cheap week. Since that's lowest offseason, there should be plenty of good resort weeks available. Read the details about fees on the website before you bid.
Here are some nice resorts you might see there (the * denotes some of my favored ones):
Lake Buena Vista area:
3664 Embassy Vacation Resort at Grand Beach
1699 Royal Palms (*)
1276 Sabal Palms (*)
0450 Sheraton Vistana Resort
2750 Sunterra Cypress Pointe
3996 Sunterra Cypress Pointe Grandvillas (*)
6315 Sunterra Resorts Grand Beach (same as Embassy)
S. I-Drive area (easy commute to WDW):
2619 Cypress Harbour (*)
3517 Hilton Grand Vacations Club at Sea World (*)
4852 Oasis Lakes Resort (*)
6059 Sheraton Vistana Villages (*)
Kissimmee or east:
3995 Fairfield Orlando at Cypress Palms (*)
2610 Silver Lake Resort (*)
5095 Sunterra Polynesian Isle (haven't seen, sounds nice)
4940 Vacation Village at Parkway (haven't seen, sounds nice)
A little further west in Kissimmee:
0670 Orange Lake Resort and Country Club (*)
3175 Summer Bay
5995 Villas at Summer Bay