I have a complete wifi security system, all are wireless, with long lasting batteries, or can be wired to power. All for $200. Includes:
2K Doorbell wifi
2- 2k wifi cameras
1 base unit/doorbell
1 floodlight with builtin wifi 2k camera
All are in good working order, this is the best no pay per month system you can get, i just needed to upgrade to make it work with my home automation system or I would be keeping all of these.