Women Shoe Discounts

Discount on Nike Air Max+ 2009 women’s running shoes?

I want to buy a pair of women’s Nike Air Max+ 2009 running shoes for my mom but they’re $160.00! I found a $25 discount at sports authority including free shipping but I’d love a discount of 20% or better. Footlocker, champs, and finishline have a 25% promotion but it does not apply to these shoes. Any suggestions would be great. Thanks!
Thanks but this particular pair is nowhere on ebay

ebay

Discount Triathlon Shoes, Tri Shorts, Apparel & Swimsuits for Men & Women