dELiA's offers the Converse Women's Ox Sneakers in 34 colors (Classic Green pictured) for $24.99. Coupon code "EXTRA50" cuts them to $12.49. With $6 for shipping, that's the lowest total price we could find by $9. They're available in sizes 5 to 13, although not in all size/color combinations.
There are many ways for seniors to get cheap -- and even free -- entertainment and services.