I didn't have a clue what the words/phrase related to, but it appears to be game related.
After checking on the ipo.gov.uk site, it shows there are 4 trademarks for that exact phrase, which are all for TM classes covering various types of computer, CD and DVD games etc, so, I think there's very little chance of a sale, as there isn't much anyone could do with it, where it wouldn't infringe on the TM holders rights.
Unless the TM holder bought, it, I'd value it at zero, sorry.
[edit]
Just to add, as you're new here, and in case you're not aware, it wouldn't be a good idea to approach the TM holders asking if they wanted to buy it, doing that, they could easily claim the domain was an abusive registration via a
Nominet DRS