I grabbed a copy of Resident Evil 2 off Humble Bundle late last year when it was one of their "flash sales" it was like $25 or $29. It is about $30 or so now (20% off).

If you are interested, here is the link - https://www.humblebundle.com/store/resident-evil-2-biohazard-re2

If you decide to sign up for their monthly bundle here is a referral link (I get a small commission if used) - https://www.humblebundle.com/subscription?refc=ZE8fx9

Kinguin.net has it for about $21 - https://www.kinguin.net/category/58771/resident-evil-2-biohazard-re-2-steam-cd-key/?r=65479 (affiliate link)

There are cheaper options, these two and Fanatical.com are my favorites for getting games cheaper.