I use two of these with Cammy's (https://www.cammy.com/gb/) free service to record images when motion is detected in the house. They're a bit fiddly to set up but haven't skipped a beat since. I'll be buying a couple more at this price.
This is the cheapest I can find. Same price at eBuyer. I'm waiting to see whether Flubit can do any better.
Hope this helps someone!