Starting with the 2 "Vegas" domains, "Las Vegas" is just a much more in demand term than "Vegas".
LasVegasFlights.com, a better term and the top extension, only sold for $6000 in 2009.
"Vegas Jobs" is a stronger keyword IMO because of the potential use, but at the same time once again don't see much reseller value at this point.
At this point I think keywords just need to be a lot stronger to have much resale value in .CO
Brad