Amazon offers its Amazon Prime members the Premier Pet Come With Me Kitty Medium Cat Harness with Bungee Leash
in Royal Blue for $9.60
with free shipping
. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.19.) That's the lowest total price we could find in any color by $5. This 4-foot bungee leash stretches to six feet and fits cats with 10-1/2" to 14" girth.
Of note, several other size and color combinations are also available from $10.59 with free shipping for Prime members.
Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that currently there's a waitlist for Amazon Mom.)