The Shadows 45 is an anomaly, the result of two bidders vying for it. I would not consider this record maintaining the 4 figure price paid; a fair value is more like $300 for the condition. This Gold Standard label pressing has a better coupling of tunes. The first label issue on Switch of "Tell Me" is really hard to find (has lotsa room reverb added that is not heard on the Gold Standard version). 'Tho probably less desirable to most as it contains a dull instrumental A-side version of the jazz standard, "Take Five".
To answer the bidding pool query: I believe it is a combination of the pervasive DJ contingent coupled with a small influx of newer collectors coming into the field. There always seems to be that one guy (have not seen a female big spender come along as yet) who has seemingly unlimited financial capability to outbid competing collectors. You will notice several recent ebay wins of what some would consider excessive bid amounts, all won by the same bidder. He has dominated ebay auctions featuring bonafide, rare "monsters". I do not know him personally, but he is only after garage 45s, unlike Mr. Lewis from NYC who can easily afford any 45 he desires regardless of genre category.
The DJ contingent has completely disrupted the garage/psych marketplace. Trying to get a handle on their buying and selling activity is akin to stock market speculation. 20 years ago, a collector could study and make reasonable purchases based upon the marketplace at that moment coupled with past history (number of copies extant, in collections, sales activity per mail order lists, etc.). Unlike today, a dealer would often be much more inclined to put a price on a garage 45 based upon input from knowledgeable people, adjusted accordingly up or down based upon demand for it. Things were much more fluid. Sure, there would be someone who came along and offered 3-5x more than what a 45 sold for in the recent past , but not to the extreme that the DJ contingent has done in recent years.
The big difference between the "high rollers" who came into the collecting fray years back, and the newer bidding pool, from what I have observed, is a complete lack of regard for the condition of the 45. From a logical standpoint, a G plus condition 45 should sell for no more than 10-15% of a Mint minus value, one that can be traced back over time from past sales. However, the DJ oriented buyer has thrown that market concept out the window. In 2021, condition is practically irrelevant; owning the 45 is more important. We can no longer accurately value discs downward price-wise from a near mint origin. If a less than VG copy of the Paragons "Abba" routinely sells for $1,000, does that imply a near mint copy is or should tote a pricetag of 4 X 5 times that amount? No. It might sell to a high roller, but for most people the cost will be too high for their budget, even if they desire a hi-grade copy. Paying high prices for beater copies of well-known classics, hyped "floor fillers", (good or absolutely dreadful), touting a former common $20 disc as a "new scene discovery" that sheeple DJs drive up the price for tenfold seemingly overnight has veered the marketplace to a financial roller-coaster ride. Every DJ collector wants the same 100 discs in their play-box, while great "chairfiller" (undanceable) 45s can now be had for far less than what they sold for in the recent past. A Mint Minus copy of the Maundy Quintet on Paris tower, and essential (IMO) to have in one's collection sold for aa bargain price - less than $200 - a few days ago. It does turn up but rarely in high grade condition. I paid far more for my copy in the same condition.
But ya can't dance to it in your retro-themed abode.