Amazon UK has Star Wars: The Original Trilogy (Episodes IV-VI) [Blu-ray] [1977] [Region Free] for £15.99. Shipped to US it comes to £16.41 or $21.05 (assuming you pay in USD).
Star Wars: The Original Trilogy (Episodes IV-VI)
When it comes to Star Wars everyone has an opinion about which of the sets is good or not.
I have no idea if this is the best set to own or not, just thought the price was good.
This is the lowest price that this set has been at.