Who care how much it costs? Just over a year ago I was prepared to pay about £150 for the VHS boxset but decided I'd wait until I bought a DVD player. Box set is £39 at Play so for 9 episodes that's a mere £4.33 per episode. But wait... we get the pilot as well so that's worth an episode at the very least (if not more), so £39 for 10 episodes = £3.90. Dirt cheap when you look at it that way
One things for sure anyway, no point owning a single episode of Twin Peaks unless you have all of them, plus the pilot, plus Fire Walks with Me.