Another problem I’ve noticed with these types of names that cover an entire country’s real estate - is that there are very few such successful sites. Propertyuk.com is one. However, a real estate broker doesn’t cover homes for more than his city - being a broker for an entire country just isn’t the way it works.
Which is why so many of these “country wide” or (in the US) state wide directory type domains - for doctors real estate brokers attorneys whatever - are of little value. When someone searches to buy a house or find a doctor or attorney he’s looking in his / an individual city.
And then - even the domains that do apply to just a specific city, now your target is a professional or professionals in that city who don’t already have a website, or who want redirects.
All are a hard sell and generally not worth a lot. I doubt that the ones that did sell for a lot in the past are making money for their owners.