It depends of course. Speaking NFL, if I didn't hate the Falcons I could get a decent seat here in the Georgia Dome for $50 or less.

I've paid about $70 to see preseason games but only to get excellent seats that cost hundreds for regular season games. For example, 6 rows from the field at the goal line for the Saints and Packers at Lambeau Field in 2004 (pics here - you'll have to scroll down) or 4 rows from the field at the 10-yard-line in Tennessee for Saints-Titans a couple of months ago.

Paid $100 each for row 35 from the field in the corner to see the Saints mop the Superdome with the hated Falcons a few weeks ago, but only because we got tickets in May, long before all the game hype started. Pics here .

P.S. Check out seats.com , an excellent site that will show you the price range for tickets to all kinds of sports events. For example, tickets for next week's Saints-Ravens game range from $78 to $535.