The People's Bible was republished as Preaching Through The Bible (Baker, 1978-2018). The 14 volume set is available in Logos (for less than this set).
This does appear to be a mistake. As you mentioned, Prem, Marshall's NT theology is already available in Logos. And the ISBN numbers listed here for this pre-pub order are for Guthrie's NT theology.
When I click on "Check out the complete list of documents," it seems to list only a few of the 25,368 documents from 1069-1519. Is there another way to look at the complete list of documents?