Amazon with B King has the 8-Pack LISEN Magnetic Adhesive Cord & Cable Holders (Black) for $9.18 off - 50% off with coupon code RNVJWC2C at final checkout = $4.59 with free shipping on $35+ or with Prime. Purple and White are $4.79 w/ coupon.

10-Pack is $4.79 with coupon R7ONSLEC, and 16-Pack is $6.99 w/ RNVJWC2C