25.00 coupon from eBay for shipping supplies. How do I handle that?

So eBay would give you a coupon once in a while for shipping supplies. Here is the break down.

 

 $26.55  Item = Rolls of eBay Branded Tape

 $ 0         Shipping Free

-$25.00 Coupon

$1.41     Tax

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$2.96     Order Total Which I Paid

 

What's the proper way to handle these coupons as I did spend a whopping $2.96 of 6 rolls of the stuff. lol