Before the NES, before video game market crash in the early 80s. Atari and other like them were $30-$40 which is like $70-$80 today factoring in inflation. In the days of Nintendo and Sega games were $50+ which if you factored in inflation would be about $90-$100 today. Games today are cheaper than games of the past, a large part of that has to due with the changing of cart based media to disc based media.

I distinctly remember my father buying me Super Mario Bros 3 brand new when it first came out for $50.

I'm still trying to scour the internet for old school pricing for further proof. But I'm 100% certain games back in the day cost around $50 and they were commonly on SNES that were upwards of $80-$100.