Proozy offers 10 Pairs of Columbia Women's No Show Socks in several colors (Solid Miami/Charcoal pictured) for $49.99. Coupon code "PZY17" cuts it to $17. With free shipping, that's $43 off list and the lowest price we could find. They're available in size 4 to 10 only.
The planet will thank you, your local (overwhelmed) landfill will thank you. Even your budget will thank you.