In my neck of the woods, Elvis records in "antique booths" tend to get overpriced, regardless of supply, demand, or condition. And they sit there. (You know far better than I that there are some desirable and valuable 45's and albums by the King (not on acetate). But "it's old" and "it's Elvis" seem to be the determining factors for setting a price.

Most antique mall resellers don't seem to use guides like Goldmine (and for most 78's there are no reliable mass market guides), so their pricing tends to be arbitrary.

About 10 years ago, came across a box of about 50 Dunwich 45's (24 unique records, including a few rare picture sleeves), many scufffed but not in bad shape otherwise, plus about 40 other 45's and EP's. (My best guess was th at t he original owner was an executive or employee of Dunwich.) The seller wanted a couple of dollars per record. I offered the clerk $50 for the entire box, and resold the Dunwich records to a large buyer (whom I found from a Goldmine ad) for $1500. Fortunately for me, the seller didn't know how to perform basic research.