As an Airbnb traveller I think of more than the cost of a place. I think of value for money as well. So here is something to think about: Of the 5 European cities in which I stayed in Airbnb places this year, Josef's place in the Old Town was: a) the most expensive; and b) THE BEST VALUE.
Three things made it this way.
First, the apartment itself. It was spacious, in a great building that was quiet at night and it had all the modern conveniences. After 3 weeks of travelling around Europe, we especially enjoyed having a washing machine (and heated drying racks) in the apartment.
Second, the location. The apartment is in the heart of Old Town Prague, a short walk from great restaurants, shops, the market, Old Town Square etc. Staying here means staying in the middle of it all.
Finally, the host. Josef is a young guy but he really gets what it means to be a good host. Over-the-top communications skills ... always willing to do something extra to ensure his guests have the information they need to optimize limited time in Prague. His offer to arrange an airport taxi on our check-out morning was just one example.
Bottom line: get past whatever concerns you might have about the cost of the apartment & rent the place. You won't regret it.