Not for the NBA and NHL if the team is good (even in the nosebleeds)
Yes, you can. I get them all the time in Dallas for the Mavs and Stars. Its not hard to do if you do a little work when you look. I've had the same experience for Rockets, Spurs, Thunder, Hornets, Nuggets, Nets, Bulls, Celtics, Grizzlies, Blackhawks, Avalanche, and Bruins. These were all in the last 5 years.
Now if you get picky and only want Saturday night tickets for something like Miami/New York, you'll have trouble. But if you go check out a midweek game against any average team you can find good prices.
This post was edited on 4/8 at 11:36 am