They're more expensive than they were 15 years ago, but are not more expensive than they were 30 years ago.
I remember my dad paid like $120 for fuckin' Dr. Mario on the NES when it was brand new. Meanwhile, up until a few years ago, I had enjoyed spending no more than $50 for a brand new title. Now, depending on platform, it's between $60 and $70. Though I see the new NHL game is $99 and as far as I could tell, that was the base game not even a collector edition thing. It also shows NHL23, one I own, for the same price. I got it for $10 at GameStop used lol