Often people need a camera to learn or just to test things out. Understandably they do not want to pay a lot of money but they need something that will not fall apart or refuse to connect (see this discussion).
The camera needs to be ONVIF Profile S OR have direct integration with multiple large VMSes.
That said, what would you recommend? Please give a specific model number, price and URL for sale online.
There's no point in suggesting anything over $150 as there's lots of cameras from big brands available at that price.