Here is a link to timeshare rental sites, if you want to check out rentals at Flamingo or other timeshares, through owners.

You can also rent them through regular rental places, like Travelocity, etc., if you are interested in Flamingo in particular. Flamingo itself is on the ocean, but not all units there have an ocean view. If you don't necessarily want to be in the exact same resort, I might recommend LaVista Beach, which is very close to Flamingo. They are a much smaller resort than Flamingo, all units right on the ocean (although truthfully there's not a good beach there). I personally LOVE Beachside Villas, which are as ON the beach as you can get in SXM. For December, a bit pricier, but fantastic ocean views!