These dates are available through resortcerts.com. You can buy a certificate for about $250 for a one week stay at timeshares from Skyauction. Log on to Skyauction and check out their hot deals for the certificate last selling for $249.99 plus $20 processing fee. Many two bedroom units are available checking in on 4/1 or 4/3 but there are many options checking in on 4/2. Not all resorts are nice so read reviews off trip advisor first.
Paying around $38/night for a condo is a good start towards any budget trip. Log into resortcerts.com, and look under USA, Florida then Orlando to see the four pages of condos available in April.
I've booked on Ebay but usually paid more. Fantasy World get marginal reviews and Summer Bay is far away. I prefer Wyndham Cypress Palms among others.