I think it really depends on your demographic location.
Down here in Surrey my min charge is 22 leptons and that's actually a competitive price. Some round my area are charging 45 leptons.
Average pricing for me is around the 35 mark for a three bed semi. Around 50 for bigger detached places and nudging 80-100 for my larger properties.
But then again it's all relative.
My council tax is just under £180 a month rent down here for a 3 bed semi is approaching 2.5k a month and over 500k to buy.