Nice surprise in my mailbox. Best Buy delivered my order of Star Trek V & VI today!. I know what I'm watching tonight.
The DE Complete Adventure will have to wait since Amazon is giving me a delivery date of September 20th.
Best Buy has historically been slow on their listings, but it looks like they are up today:
Director's Edition Complete Adventure
Star Trek V
Star Trek VI
Original Motion Picture 6-Movie Collection
Your wording is confusing to me. The standalone releases of Star Trek V and Star Trek VI contain both the 4K UHD disc and Blu-ray, along with a digital copy. So if you already have the Original 4-Movie Collection of ST1-4 then you do not need to buy the Original Motion Picture Collection.