Wow seems a nice constructed site there at xxxxxx and indeed positioned as you stated. And I note the disclaimer which I did look for.
The bottom line is it depends on what you can get away with, and for how long ? There has been examples given on Acorn in the past in which a 'Seemingly' TM conflicting domain has been in fact given the nod by the TM holder to operate. On the other hand a TM holder can possibly (with due reason) get a site that's been running for any length of time subjected to a cease and desist order .
In looking for a value for a TM domain, as you asked with Liverpoolfc. I can't see you getting one here or on most domain boards - that doesn't mean you couldn't sell it.
** Edited out further comments**