I'd recommend going to StubHub and watching the action on the Wizards at Mavs game (3/13). Ticket prices generally go way down in the last day and hours before a game. If you buy now, you are paying a premium for that peace of mind of having ticket in hand.
The Wizards will give you a good idea on what to expect for the Bobcats (if StubHub is a possibility). Bad EC teams playing on a weeknight will mean very discounted tickets. I can't speak for the Dallas marketplace, but NBA ticket on stubhub have been going very low this season in a lot of marketplaces, especially day of game, just a few hours beforehand.