Looking at bundle books like word biblical commentary is like $700.00 and is 59 vol if a person was to divide the price by 59 is comes out to like $11.86 much cheaper than paying the $50 a book which comes out to $2,950 a huge markup even for the displayed price if bought individually. I think it would be much easier to by individually by that method of dividing commentary by there volume and buying that way makes it much easier for a person to get what they want and at the same time not have to put it all a big price on a payment plan that would come out to like 58$ a month........ So in effect dividing the price by the number of books in a volume and then multplying that by the number of books comes out to the displayed price and makes for much easier look at real cost of the book there for makes purchasing what you need when you need much easier.