Orbitz is offering a round trip flight from Boston with 7 nights at the Caribbean Sunset Resort in Negril for $544 with all taxes and fees included! I know the flight is worth $320-$400 depending on where you book it so the hotel must be really cheap. For a comparison, Rooms on the Beach is Ocho Rios is $746 for the same dates and flights.
Note: I have never used an Orbitz coupon but from a quick search you can save 10%.