Telltale Games' Sam & Max Seasons 1-3 are now $39.95 on http://www.telltalegames.com/
. Don't worry if it shows up listed at $49.95, if you add it to the cart, an automatic discount code should be applied to bring it down to $39.95.
For those who already have S1 & 2, S3 is $19.95 on both TTG and Steam.
Classic series, but S3 is really the best that TTG has made so far, even better than Tales of Monkey Island, IMO.
Wind, Sand and Stars.