Valuation difference

[tentmadam]

This story runs and runs.To some up the latest problem.My sister shared the ownership of a property my mother left to us .She never maintained the property or paid the bills since our 5 years of ownership.She has now died.Her half has been left to her children.They want to sell us their half but have had the valuation of the property greatly inflated.While I have told the estate agents we used that my parents are buried there and that there is a sitting tenant farmer on the land.Their solicitor has said that is no matter and shouldn't come into the valuation.I don't feel this is right as who ever end up with the property will have to take this into account .My nephews and niece still haven't paid any bills and their solicitor doesn't seem to be encouraging them to do so despite being sent copies of them.Any advice please.