I am not trying to take business away from TTG's store, but GoGamer.com is selling the PC version of Sam & Max Season 1 for $5.90. Shipping starts at $3.
If you have been thinking about getting this game, now is the time to do it. I have done business with GoGamer several times in the past with no complaints. C'mon folks, it is less than $10. And if you like it, there is a whole other season awaiting you!
*NOTE* As pointed out by Emily below, this may be the UK version of the DVD.