Remo Plus Home via eBay offers the Remo+ Smart Door Camera for $99 with free shipping. That's the lowest price we could find by $30. (This ties our Black Friday price, although we saw it for $10 less last month.) It fits over your door and features a 160° field of vision.
Forget subscription-based genealogy sites. Use these free databases, instead. They are a treasure trove for family history researchers.