I have noticed exactly the same effect. There are a lot of solid family homes that seem like reasonable value. However there are a lot of overpriced flats particularly in the Marchmont area. For example, I think this is a nice flat but a tad ambitious price,
http://www.rightmove.co.uk/property-for-sale/property-33920257.html
Good luck if they sell it for that. It proves the old axiom - sellers rarely know the market value of their property but buyers do.