bettingon.org - $180.00
Possibilities endless with this one.
(I could make a list of 15,000+ things/teams/sports/events etc. to bet on).
Would have to be careful with the site layout with a domain like this to avoid Google issues, but done correctly it has a huge potential. I have far too many domains though. Short betting domains that make sense (as opposed to betting341, which doesn't make sense / mean anything) are harder to find these days - think this is well worth the a shot for $180.00 if someone wants to pick it up.
Push to moniker only as it was just renewed.