I find this fascinating; you can now buy single episodes of Star Trek: The Next Generation on Blu-ray on sale for around $8 each. This means that rather than having to buy a full season of episodes to get the few you really want you can buy exactly the episodes you want instead — or at least the episodes that are currently available as singles.
The downside of that is that whereas you can buy an entire TNG season of episodes for between $80 and $130 retail, sometimes as low as $25 per season on sale, buying each episode separately on Blu-ray would price the average season at something like $200 for the sale price, $425 for retail!
