Earlier in the month Hotspur posted these as a clearance deal at 30% off. That thread has reported some stores are at 50% or even 70% off at this point so here is a fresh thread.
I got the last pack at the one local store that has $165.50 but expect other stores to follow. Apparently many stores received additional stock since the first deal post so check brickseek.
People have found these in electronics as well as in endcaps in housewares. The deal is only on battery units, not wired.
Note that Target policy is not to price match prior purchases or other local targets on clearance items.
Also note that these units will be doorstops 10 years from manufacture date and there is no way to view that on the package. My purchase was made in July 2018 and will stop working in July 2028. So I guess a double YMMV.
But by far best deal I've seen on these units, I'm trying to get my whole house on Protect at this price.