@lieberal I am not an expert in this but it seems rather sketchy to say using an algorithm is cheating especially when they don't address what is in the algorithm and the market share of said algorithm at all. If I am reading it right it would be wrong for every landlord to at turnover price their property at the first quintile of all rental properties in their area similarly speced which seems strange since if I am going to sell something the first thing to check is sales of that same thing.