How do I take two listings and bundle it into one for a customer?

[dhuzyk]

 I was contacted by a potential buyer. They said they were interested in two video games I have for sale, and asked if they purchased them together if I would waive the shipping. We've come to an agreed price, but the problem is these two items are still up under separate listings. How would I go about creating this bundle deal? Any help would be greatly appreciated!

[momcqueen]

Are these your auctions or your buy it now items? You cannot add Best Offer to an auction with bids. You have to let it draw to its natural conclusion unless there is some sort of emergency.

Maybe your question is less about bundling and more about how to Send an Invoice after an item has been bought but before it is paid?