As somebody who has a quite complex stock, selling replacement Lego parts with millions of parts in stock and 100’s of thousands of unique items, this would be extremely useful, for items that are effectively the same but might either have a ,insignificant added extra like batteries, a cable that you have an abundance of but is just a small upsell on the same product wrapping etc Or is listed multiple times as is being promoted in different ways i.e. one with a high promotion and has a higher price bogoff listing free postage,it not free postage etc. so this would then conjoin all these items and allow one central stock amount.

This would be extremely useful, Please do this as would open up a whole new ability for advanced selling options & enhance the tools here above anybody else :-)