You are only delaying the inevitable. He will presumably apply to court to change the asking price. A house is only worth what someone will pay for it, there is no such thing as a "firm valuation figure".
So you can delay it by stalling in this way, but you cannot prevent it from happening. And if a court application is made, you may be liable for a costs order. If a costs order is likely then you would be better off to co-operate with a sale.
The post has been edited by the original poster, and the question removed. Sometimes people do this after they get their advice, to remove information they regard as personal.
Personally I find it quite annoying when they do this, since others in a similar situation may have found it helpful. Oh well.
The poster was wanting to stay in the FMH even though there was a court order for its sale, and was not prepared to lower the price to a more realistic figure, even though it had had no interest at the current price for 2 years.