I'll say the obvious first; the singular would have been much better :imho:
With that being said, it still has plenty of potential as a comparison site. Paying by mobile has already gone retail in a few parts of the world so there is proof of concept.
It will be at least a year or two before you can reap the benefits of this name and it will probably need to be developed.
My appraisal with a nicely developed site would be high xxx - without a site high xx to a reseller, maybe up to mid xxx to an enduser.
Good luck!