This ad doesn't make sense to me. It looks like the UBS6 will be offered with or without the apparatus at the bottom the page, even though that is a built-in part of the book. And to add the bottom of each page will more than double the price.
Am I reading this right, or is the 'with critical apparatus' referring to something more than what's on each page of the text?
[The product shown as a 'collection' is this-]
If this is the marketing strategy, it's like selling a new car without wheels…they are extra. Shame on Logos if this is actually the case!