I like the general idea behind Dynamic Pricing - i.e., showing me my price for a set of commentaries which factors in the ones I already own... BUT... it Logos wants to purchaser to really know what s/he's doing, if full transparency is desired, I think more info needs to be listed.
For example, I have 28 of the Exegetical Summaries and now there are 32 of them on sale as a group. The Dynamic pricing first jumps out to say - "Hey, you can get this set for $55 when it's usually $639". Great, but then, I realize I already have most of these (something easy to forget when you have 5000 books in your library (not bragging, just saying can't use them all the time and can't immediately recall what I have... can't be alone in this I think).
But, then I DO remember I have the set and I am left to wonder... "For my $55, how many am I actually getting" (I had to go to my library, type in the title and manfully count them to know) - and then, I was still left to wonder - "Now, WHICH ones specifically am I adding to my set by this purchase? Without this info, I am still left to wonder - how much would these cost NOT bought as a group now but individually? And, Are these books that I often study and want to add no matter the price?" I'd have much work left to do to know this. BUT, if Logos software is already in the background looking at my purchases and uses this data to figure out my dynamic pricing offer - then why not just share that with me. i.e., "You have 28 of these 32 book. The ones you'd be adding are: X, Y, Z, A. Their usual price would be "W" - you will be paying "T" saving you "M" percent. Why not lay it all out there instead of telling me how much I'm saving by a figure that INCLUDES money I have already saved on the set. Just the new titles and price I'm saving on the new purchases vs their regular price and nothing more. THAT would be helpful.
Maybe the website does this somewhere and I am just missing it - but - if it is... I am missing it.