is gonna be brutal for Retro videogames. Outside of few exceptions (stuff like Earthbound, Panzer Dragoon Saga) videogames are not rare items at all, they were mass produced mainstream products and so there's way more old games in the market or in people's attics collecting dust than there are people interested in buying them. Price increases don't correlate with rarity, only increased hype, and you can actually see the age of collectors just by looking at the games that are increasing in value, like N64, ps1 and ps2 games going up because more millenials are all gay for them.
A big burst is bound to happen eventually and a lot of people who though Duck hunt and a jizzed Silent Hill 3 copy they paid 400$ for for would put their kids trough college are gonna be left carrying the bag. In fact all this stuff is still extremely cheap in Japan, retro games are still easy to procure for cheap in bargain bins, maybe jews do fear the samurai.