I have one by dlink. They make baby monitors and also wireless cameras so I am not sure of all the pricing. Here is the one I have:
https://ca.dlink.com/products/connected-home/cloud-camera-1150-daynight-network-cloud-camera/
I like this one because you can set it up so that if there is motion you will get an alert to your phone. You don't get a handheld unit to monitor with, you use your phone or computer. You are able to monitor the camera from anywhere in the world because its done wifi. So if have to go back to work and have someone at home taking care of lo, you can still monitor from work. It's great when lo is napping any you have to go out to the backyard, you don't loose the signal.