
In New Zealand we have The Warehouse, which is in between Wal-Mart and K-Mart for material, quality, etc.
Recently (like in the last week) they've realised DVDs are becoming harder and harder to sell and so they've slashed all tv shows made prior to 2000 (with a few obvious exceptions) to just $10, which is about US$8, or UK 5 pounds.
Considering I have a gap on my shelf which has always bugged me (I've never bought season two, for a variety of reasons) I have no excuse not to complete it.

That's just NZ$0.45 an episode!