You have to ask who would use them and what for?
Once you've asked that, you need to think whether they're at all unique, or if there are vast numbers of other word combinations that could be used for the same thing.
If there are good and preferably obvious uses for them and not too many equally good alternatives, they probably have some intrinsic value as domains.
But, if the potential uses aren't self evident, the value may be limited. There are obviously exceptions - good, single words; 3 letter domains; brands and very brandable etc.
Even if there is a self evident end use, the value will be limited by the number of readily available alternatives.
CallHelp: Doesn't really mean anything by itself. Nice short key words. OK combination - but no obvious use - so would need to be developed, but potentially could be. Limited value as a domain name alone.
CoolService: Similar comments to above. Possibly not quite as good key words and combination. Maybe some development potential - but what for? Servicing refrigeration equipment? Style makeovers for nerds?
KentMarket: I'm less sure about this one. Obviously a 'Geo'. Market has a wide range of meanings and uses. Doesn't really stand alone as a domain, no obvious end use - but lots of potential end uses. Perhaps tellingly, of 86 UK counties, 78 'County'Market.co.uk are still available - so if someone does think there is some value here - there's quite a few to go at - infact, a nice little portfolio opportunity to corner a 'market'!! ;-)
I think these do have some potential, and so must have some worth - but not much more than reg fee unless they're developed or someone is prepared to develop them. Others may well disagree.