Hey I know a handful of folks on here like and wear the Darn Tough Brand of socks. (It came up in some older threads, and I'm a new convert myself.) Anyway, I was just in REI in Anchorage today, and all Darn Tough brand socks are 25% off. They are not applying the "buy any three pairs of socks and get 10% off rule," however. I bought 4 pair and that came out to $56 instead of $80. They don't carry the over the calf boot length unfortunately.
Just thought I'd put it out there. I am not affiliated with nor have a pecuniary interest in REI.