You walked across the country?We wore New Balance shoes on our walk across the country. My wife was on her third pair after the 5,000 miles, she got roughly 2,000 miles out of a pair. Usually New Balance have several models of the same general type of shoe and at a shoe outlet store you're bound to find at least one for under $60. I would get an all-terrain model built for stability (models are also built for cushioning or one other attribute I can't recall at the moment). New Balance also has the distinction of once again being made in America.
Disclaimer: I got significantly less mileage. I have pronation that wears out the inside of heels much faster. I "only" got about 1,000 miles per pair.
On edit: Oops. You got me.