Woot has Alvada 80% Merino Wool Hiking Socks Thermal Warm Crew Winter Sock for Men & Women 3 Pairs, Size S-M for $6.89. Shipping is free for Prime members (must be logged in to your Prime account at Woot).
https://sellout.woot.co
Color Charcoal
Sizer : S-M (Women 6-10.5 / Men 5-9.5) 3 Pairs