Estibot overvalues nearly all domains. For Eg: it values Namepros at USD 3,700 and one domain that I just Regged today at USD 13,000.
Google says 673,000 searches were done for this guy. So I think In this Cae Estibot may Right and your domain (Accounting for the .NET) is worth atleast $500 and more for a possible End User.