I'd ask them if they'd be interested in the domain name, for potential use out there as "keywords" in the S/E's (they are a "sponsored link" already at Google), and/or if they are planning any expansion or marketing campaigns toward the UK, in my view.
Also, the owner's of the ".COM", which points to: http://filtergate.com
Good End user potential ... hot topic ... $250 - $375+/+/+, IMHO.
Best of Luck.
:wave: