Eufy Wireless HD Security Camera (3 pack) from Amazon is currently at 20% off.
Unlike the Google Nest Cams or Arlo, Eufy doesn't have any subscription fees.
It's also completely wireless for easy installation.
And they claim that batteries last for 365 days per charge.
Although based on Youtube reviews, they only seem to last for 6 months before you need to recharge (which is still quite impressive based on what's currently out in the market).
Expedited Delivery will cost an extra $5.45.