Let's talk about value here for a moment: I recently stayed in Airbnb where the host provided everything: dishwasher, washer and dryer, full-fledged kitchen with all utensils, all the necessary stuff from which I can make a good breakfast, upwards of 10MBPS speed wifi internet, and the entire place is private to me. All this in just ~$55/night. If I were to live in hotel (which I don't even think is easily available) with similar amenities then it might cost me more than $200 per night. So that's the difference in value provided by Airbnb and Priceline IMO.
I have tried booking Airbnb many times. In my case, each time it was much more expensive than the hotel room I could find via priceline (even more once I include the extra fees from the Airbnb's fine prints).