Amazon with eufy Home has the eufy Security Wireless 2K HD Video Doorbell (Battery-Powered model, T82101W1) for $102 with free shipping. Newegg with Anker Official Store has it for the same price (ends 1/24).

Requires HomeBase 2 to operate (not included). Simple installation does not require wiring, and rechargeable battery lasts for 180 days. No monthly fees.