Some community member have provided good feedback and you can integrate them with ST. I may have seen it for 89 on new egg or ebay a few weeks ago, but I am almost certain 79.99 is the lowest I have seen so far
https://www.amazon.com/Amcrest-Dual-Band-Security-Recording-2304-1296/dp/B01LWK9VFS/ref=sr_1_1?s=electronics&ie=UTF8&qid=1495637643&sr=1-1&keywords=amcrest+ultra