I don't think you'll find that for under $100. I've been playing with these two, which are about as cheap as I could reasonably find:

https://www.amazon.com/gp/product/B09PKWWC93/

https://www.amazon.com/dp/B0BLSL5MWF

Just arrived and they seem to work fine "on the bench." I've been using indoor Foscam cameras for ages. These new ones are outdoor, have PoE built in and have optical zoom.