Dolly Bantree's name is a pun on Lilly Langtree's. Langtree was a popular singer, the object of Judge Roy Bean's obsessive affection.
"Buford" appears to be a direct lift (that's the polite way of putting it) of "The Trappers", a "Gunsmoke" episode. Both involve a man-and-woman confidence team trying to separate wealthy men from their money, and a fake-diamond necklace is involved in both stories. True, there are only "so many" plots, but the similarities verge on plagiarism.