Buy 1 season get 1 free
On Stargate SG-1 and some other series at Best Buy. You can get SG seasons 2-7 (I'm not sure why season 1 isn't included) for about 25 bucks a piece. This is good at the stores even though they are not really advertising it in store.
Don't make the same mistake I did: I wasn't paying attention or I could have gotten Rescue Me Season 1 for free (I picked up all 8 seasons of Stargate and didn't look at the receipt but confirmed that season 1 wasn't eligible). D'OH!