For its newsletter subscribers only, newegg takes 20% off Coboc 1-Foot Ethernet Cables in Blue or Black via coupon code "EMCNDNE224". (You must buy at least two cables for the coupon to work.) It's the best percent-off deal we've seen on these cables from newegg this year. Shipping adds $2.99 for quantities up to 20.

A best bet is to buy 20 cables in your color choice for $12.80 before the above coupon, $10.24 after. With $2.99 for shipping, that's $0.66/cable and the lowest total price we could find by $7.