I don’t know - I see two things happening in the hobby on the upper end and the lower end.
On the upper end, we have seen prices come DOWN on many titles - MM, MB, SMLE, TronLE, CC, BBB, AFM, Luci, etc. Most of these are all due to remakes, threat of remakes or vault editions.
On the lower end, prices are simply adjusting to demand (more people in the hobby) and the rising prices of the new titles. $6-$12k is a huge chunk of cash to buy a new game. This has caused many of the “B” and “C” titles to increase significantly in the recent years.