The hyphen devalues obviously. Its a clear enough name, but not one I'd buy personally even if it was $x as its too tricky to brand with the - so you'll always lose traffic to the non-hyphenated version.
Maybe worth $xx to you if you intend to develop it. Resale maybe tricky to end-user in this market as we're starting to see over-saturation and poker has only one way to go now.