I encourage the purchase of steam games as much as possible and I love steam! ❤️, but I also believe everyday users should cut corners where possible because some companies tend to do the same and get greedy and unfair with their customer base.

Valve and Steam themselves are a godsend tho and solved many issues regarding piracy,
Gabe Newell said it himself:
"The easiest way to stop piracy is not by putting antipiracy technology to work. It's by giving those people a service that's better than what they're receiving from the pirates."

“Piracy is a service problem.” Valve's Gabe Newell said that years ago, touting the success of Steam, his online video game distribution service The premise is that while piracy is appealing because it's free, it's also appealing because it's easy. 24 Jan 2014"

with all of that said and out of the way:

https://www.allkeyshop.com/blog/
https://www.steamwishlistcalculator.com
https://steamcharts.com

Bonus: https://www.cdkeys.com/
ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ 🏴‍☠️