Valid through 5:00 PT today only. Just worked for me, should work for you. Only requirement is that you pay with paypal and don't use it for real estate, eBay gift cards, or coins/paper money.
Buy item, proceed to checkout, and enter coupon code C15LIMITEDTIME before paying.
http://pages.ebay.com/promo/2016/033...c=1&rmvSB=true
Happy shopping!