Just like the title says, have NES game prices peaked or is likely to continue going up for the foreseeable future.
Just wanna point out your asking people to predict the market
Can it go up? Of course!
Has it peaked? Maybe
Sure, just haven’t been keeping up with price changes the last couple of years so wasn’t sure if things were trending in one direction or the other.
It will probably continue to increase. No more are being produced, and the more worthwhile ones are being added to collections and taken off the market, so what’s left on the market is increased in pricing. Some also become lost or destroyed over time. It may come down when buyers are no longer interested - maybe that means the people who fondly remember NES games have passed on, so this would take a while.
I think it can keep going up.
Don’t forget to include inflation. In the US it’s more than 75% since the year 2000.