What happened to Reserved List cards?

So I've been out of the loop for a couple of months and I can only speak for EU market as I currently don't pay much attention to US market but here in the past 1-3 months prices for many bronze age RL cards made a jump of like 25-75% and supply for many golden age cards (specifically Beta Power 9) got significantly reduced, lifting at least the asking price for many by about 1-3k per piece.

Was there any surge in oldschool demand or something other that ran past me or is it just ye olde semi-predictable cycle repeating themselves?

I didn't see that coming in the current landscape and sold quite some RL pieces at comparable low prices 1-2 months ago and ask myself what happened here in the meantime....