Dave B's do not need to be glued in.. they press fit into place. I think the finish on the dave B's is better too, but aside from that, you can't really tell unless you have em side by side.
These things are a hot commodity regardless. People have been wanting these since he stopped making them. I got the pleasure of talking to him, since he comes out and does the MI fun runs from time to time, and got to hear all about these.
Good luck with the sale, I'm sure it won't be tough.