Needing cheap contact sensor (2020)

[jlv]

You can read through the thread I started earlier this year asking the same thing. The Iris V2 ones I found are all sold out ($5 each!), but I think there were other suggestions in the thread.

Recommendation for contact sensors, in bulk?

I’ve finally using up the last of my Iris 3320-L contact sensors I bought a while ago. I’ve got 25 and they work great. But as part of another project, think I’d like to get 15 more contact switch for use on some windows and to measure temperature. Does anyone have a good recommendation for inexpensive contact switches that work with SmartThings? I think I’d prefer Zigbee, but I’m willing to be flexible. I’m hoping for around $10 each (I was spoiled getting the Iris ones for that).