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]

Wait, this is only about shipping? The buyer will pay asking price if you give him free postage? 

Ask him to buy them and then Send Invoice with the postage amount changed to zero. Tell him to wait to get your invoice before he pays.

You might have to add Best Offer only to override Immediate Payment Required if you had that enabled.