Amazon has the UNITEK 3.5mm Male to Male Coiled Stereo Audio Cable in 5 feet for $5.99-$3.00 with coupon code Z43CNZWS.
Makes it $2.99 with free shipping for Prime members, and it is NOT an add-on item!
(Also means you can do snail shipping for $1 credit.)
https://www.amazon.com/gp/product…UTF8&
Got for my Amazon Echo Dot, since coiled keeps it out of the way.