VRBO is your friend. Do a search. My wife does the leg-work and we already booked for July. The number of beach-front houses is declining. They were built years ago and shore erosion has reached a point where they can't be re-built once they blow down (hurricane). Costs us about $3500 for beach-front, quite a bit less if you don't mind being on the bay side or across the street.
Here you go:
http://www.vrbo.com/vacation-rentals/usa/north-carolina/coastal/outer-banks
Check out Nags Head, Kill Devil Hills, Kitty Hawk, etc. Also look at Oak Island...a bit further south but we had a blast there two summers ago. We're there July 11-18. If by coincidence, we're there at the same time, a cooler full of Sam Adams and a pot full of crab, corn, sausage and fish await.