On Namebio at least they only show a handful. dubai(.)rentals went for 1 k, losangeles(.)rentals for 300 while van(.)rentals for 220. Surprisingly the top sale is for 30a which makes no sense to me. So I would see these as hard to sell, if you have a geo name with a good sized market (like a major city or a country), or something really good like apartment or vacation etc. you might get $$ to possibly $$$, but it will not be an easy sale in the current market.