Tropical Sky, First Choice and Almond Resorts all offer inclusive Carribean vacations for good prices. Some also offer free all inclusive upgrades and most are under a thousand pounds for 7 nights.
They are websites that offer cheap vacations, they normally advertise on the tv or in the paper, but then again travel agencies will have websites with various deals for holidays.
It is very difficult to find all inclusive resorts in the continental united states. Most all inclusive vacations are located in the Dominican Republic, Hawaii, Mexico, Virgin Islands, Bahamas, Etc.