There are several collections, especially in the minor prophets, where there is a lot of duplication of similar resources and overlap of identical titles. A sales rep would have to DP these collections so you wouldn't pay twice for the overlap. Similar titles may make the collection unnecessary.
Some examples are:
https://www.logos.com/product/171500/nahum-study-collection
https://www.logos.com/product/171501/habakkuk-study-collection
https://www.logos.com/product/171502/zephaniah-study-collection
They all have dynamic pricing enabled though. You could just buy them one at a time if you don't want to pick up the phone.
Alternatively, send an email.
There appear to be major errors with the dynamic pricing. See this post.
Well, hopefully no one is buying them now anyway. The campaign says there will be deeper discounts after the 4th. Maybe they'll have the basic arithmetic of things worked out by then, but always good double check. caveat emptor.
They all have dynamic pricing enabled though. You could just buy them one at a time if you don't want to pick up the phone. Alternatively, send an email.
I normally deal with my sales rep via email because of my hearing problem and wanting to have a record. I explained my concern about purchasing 2 or more collections with overlapping resources, but different discounts. i.e. 35% vs 60%. It seems like you would want to purchase them in the sequence of highest discount first and let dynamic pricing do it's thing. I don't know if the sales system takes care of that or not. I told him I'd like an answer by the end of the month.