Amazon offers Prime members the Star Trek: The Original Series on Blu-ray for $39.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $4.98; Target charges the same.) That's the lowest total price we could find by $11, and the best deal we've seen for this 20-disc set since Black Friday, when it was $4 less. It includes every episode of TOS.