I'd be pretty careful with buying a computer for less than $100. For about $200 you can get a fairly nice used computer that'll last you at least the next 10 years.
Intel i5, 8 GB RAM, 256 GB storage, and a 2-something Ghz processor are more than enough spec-wise to run almost any application and most game engines*. It's decent for gaming, just don't expect too much out of it. A lot of stuff on Steam won't run that well, but my specs are pretty close to these and I've rarely had trouble with an Itch game*.
*Unreal Engine is the exception.