Looking at the misunderstanding on this thread, it would be very helpful if FL could include other editions on the product page. For example, if I went to the first edition of Church History in Plain Language, it could let me know that there is a Fifth Edition Ebook available for sale and a Logos Research Edition of the Fourth Edition in prepub. The later editions could link back to the earlier editions, and then I could see at a glance that the add to cart button is grayed out if I already own it.
Obviously it would take some manual cross-referencing (although since the authors and title are generally the same, it seems like a lot of it could be automated), but I think this would be a valuable service to customers.
