Nordstrom offers the Nike Men's Air Futurun 2 Running Shoes in Volt/Silver/Black/White for $50.25 with free shipping. That's the lowest total price we could find by $10. They're available in sizes 7.5 to 14.
If you're at least 62 years old, you can score a $10 lifetime pass to America's federal parks and recreational lands. But act quickly because fees are about to jump.