Good gear has always fetched high prices on Ebay. Junk gear prices are often set high but the crap gets passed in.
Managing one's expectations and keeping them at a realistic level goes a long way with surviving Ebay frustrations. Too many sellers have are sentimentally attached to their old gear and want ridiculous prices, or their partners have demanded the gear gets cleaned out now or else, and domestic passive resistance comes into play.
On the other hand too many buyers expect sellers to start auction prices at 99 cents. These buyers are, I suspect, resellers hoping to buy low and sell quickly for a reasonable profit, without really knowing what they have. When it doubt, price upwards.
Neither side will be happy with Ebay prices as they are nowadays. The good old days days are mostly past.
Sellers and buyers are often unrealistic. An Australian Ebay seller I know has relisted a "well used (and abused)" Rolleicord II at $400 as is, no returns for six months. It has a 16 exposure kit which I want, but not at that inflated price. This weekend I will order 12, 16 and 24 Rolleicord exposure kits from a US seller I found online for much less than $400 even with overseas P&P factored into the deal. So go figure.
All this horse trading tends to drive buyers away from Ebay.
Leica and Rolleiflex TLR prices are all over the place. My partner wants an M2 or M3 in good user condition and we are hunting on Ebay and elsewhere. M2s are scarce, one with an Elmar 2.8 went in March for $1,100, a good price, another (lensless) at $1,600 got no interest and the seller withdrew it. A Melbourne camera shop has a DS M3 with a Summarit at $1,350 with warranty, it has "issues" with fungus in the viewfinder but we will look at it and see. If this M3 was listed on Ebay for that price without a warranty, we would not even be interested. These are old cameras, and real world concerns apply (and at times collide with sellers' and buyers' cherished fantasies).
The Ebay situation is unlikely to improve given the sellers' mindset of "worth against value" and buyers' obsession with getting bargains at any cost. Both sides have their good arguments (and many bad ones) and the various parties are unlikely to agree on anything in the long run.
I definitely agree with kcham's comment re APUG, but due caution also applies here.
Nothing will change in the short to medium term. Until the next GFC levels out the playing field and we are all poor again, as we saw in the late 2000s and will see again, sooner or later.
