Wow those places look great, thanks for sharing! Almost makes me wish I needed somewhere to stay when I visit Santa Barbara, although my friend's house is awesome too. :)
Our favorites so far that were through AirBnB and not other websites:
Gent, Belgium:
https://www.airbnb.com/rooms/1135017Maybe not the cheapest option, but compared to the nearby hotels it's still a good value even for 2 people, with more it would get even better, and the place itself was great!
Profondeville, Belgium:
https://www.airbnb.com/rooms/2627170Again probably not the cheapest around and it's not one where you get the whole place to yourself, but we were about ready to move in with them permanently. For the forseeable future, when I need to "go to my happy place" in my mind, it will be sitting out on that back patio, looking out at the huge lawn, the trees and the chickens, breathing the fresh grassy air and enjoying a nice Belgian brew. Hubby agrees. (They also feed you an amazing breakfast every day, we got quite spoiled.)