Best Buy’s official eBay storefront offers Nest Detect for $41.69 shipped when code PREPSPRING is used at checkout. Normally $49, this is the first discount we’ve tracked and the best available. This product can let you know when windows or doors are opened through the Nest application. Though this is a new product, it has received a 4.7/5 star rating, and Nest devices are well-rated.

Nest Detect features:

  • Works with Nest Secure
  • Look out for doors, windows and rooms
  • Open quietly
  • Know what’s happening at home

Nest Detect sensors can tell you two things: when a door or window opens or someone’s in a room. And with the Nest app, you’ll always know what’s happening at home.

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