Keep in mind it takes at least two bidders to drive prices up to " ridiculous" levels.
And prices can come down -- way down-- as many are now discovering. Example.A Marklin excellent Cafe station which once brought $18000- $21000 was only able to yield a hammer price of $4000 at a recent auction.
Or again--There was a situation in Hornby collecting many years ago where one individual was driving prices sky high. He wanted two of all the good stuff (or so I was told). Once he left the market, the prices dove back to their normal values.
So despite the $19000 example, prices for the most part are actually lower than they were 5-10 years ago. And we all know the answer--a lot of supply especially from estate sales, and not as much demand.
Have fun
Lew Schneider