We're living in a different world. I suspect the market for collectible anythings is entirely internet hysteria, or lack of, driven. Values always fluctuated to some degree or another, but now they rise and fall at unprecedented rates. Marlin lever actions of the last 40 years are selling for prices comparable to pre-64 and pre-war Winchesters. Between 2002 and 2005 the market for good antique furniture completely disappeared, at least in my area. Ditto for Lionel trains, imagine selling a like new in the box Browning sidelock, and being offered a third what you paid for it new, that's what happened to them.
Who knows, 5 years from now, AI might tell everyone they need SxS's and the market will explode, but who can predict it? I certainly can't.
Tim