anyone know if stats like this are prepared either by Govt, academics or analysts? What I'm after is an average price a property transaction settles at as a percentage of its original asking price?
I'm not sure if you would be able to find this out as most sales would be by private treaty - the nature of which means that the sales realisation price is never disclosed to the public. However you could try contacting the IAVI or the IPAV, failing that the Dept of Environment.
Just ask the estate agents they will tell you. It is basically 0-20% difference depending on agent and price. The average house price is about 10%+. That is prices going above guide price. Auctions are different