Ebay offers adidas men Trefoil Quarter Socks 6 Pairs for $9 (reg. $22) after code with free shipping. 

Apply Code: ADIJULY40 

Product Description: 
Your feet should be the last thing on your mind. After school, sports, your job and your friends, of course. Make these quarter-length socks your everyday grab-and-go. Not too short, not too long, always comfortable. They come six to a pack. That's adidas easy.