In my Survival 1.16.3 world I have the problem that my villager price has become about twice as expensive for everyone. I have a small room where there are no beds or any other stuff and above the room is the Villager Farm and when I need Villager I drive it with a Minecart to my "marketplace" xD but it's annoying up to now. The price now has increased so maybe someone has an idea why it could be?
Maybe they don't feel well, so they need beds, otherwise I would recommend doing a raid, so the price drops a lot, maybe you have accidentally hit them, so the price would also go up.