Very weak keywords from a commercial angle. Not a single Google Adwords sponsor ad opposite either. On the plusside 1bn Google uniques so possible branding opportunity in long run. My guess is nobody would offer you reg fee for these until the .pro registry opens up. If it did, you might them for $X,XXX+ but not until then. You've picked some excellent keywords and have done brilliantly to sell 3 of the .pros you registered in June but I can't see you talking these off the shelf anytime soon.