The source was very ambiguous once he was exposed for having more than "a couple" of copies.
When a 45 that has rarely been offered or even seen for decades suddenly becomes available, that is one thing. The price paid is usually not a realistic price - only the result of a momentary struggle against other collectors who also desire said disc. The second copy suddenly becomes available via the same seller - and savvy collectors will translate as a potential small stash. Seller will try to obtain a price close to the amount of the 1st copy, and often will stick to the inflated price IF he only has a second, or third copy.
However, with the Savoys, the seller quickly lowered prices to the point of it selling for just under four figures (after 5K and 2K sales). He evidently made discount deals to a few of the guys who recycle the same 45s over and over on the web. I saw the 45 with $800-1500 asking prices. I got mine for around $300 maybe 6 months after the first copy was posted on eBay.
I would say there were at least 20 copies of the Savoys. It's not a lot, really, but the manner in which it is priced from the get-go makes all the difference as to how it is viewed in the collector sect. I'm all for making a profit, but within reason. The seller was all about greed.
Same result concerning the midwest U.S. guys with copies of the Cholos 45. I immediately heard from someone who witnessed the initial buy at an estate sale, and he relayed that there were two boxes (20 or 25 count) that were purchased between three sellers. Greed again played into copies out of the gate selling for far too much. Now it is a $250 record, which is realistic and a purchase price one should not be afraid to make if the disc is a wanted item for a collection.