The Future Shop has the X-Files boxed sets on sale for $19.99 each. With such a good price, I ran out and picked up the last 5 sets to complete my collection [5-9]. I threw in the X-Files movie just to make it really complete and the total came to something like $116.54. Which is a great deal considering these boxed sets were much more expensive when they first came out [$113.99 each?].
They also had the Millennium boxed sets on sale for the same price, $19.99. Great series, but I've seen all the episodes already and I just couldn't afford more DVDs. They also have the Roswell boxed sets on sale for the same price. Never watched that show so I have no idea if they're worth it.