Look for these fall fruits and vegetables at farmers markets and in produce departments for the best flavor (and greatest value) in season. Specific crops and harvest dates of fall produce will depend, of course, on your region's climate. See these state-specific seasonality guides for more details.
If I remember right Walmart has a 30 day return policy with a receipt. Without a receipt the only thing they will do is exchange it for the exact same thing. If you have the receipt you should be able to get if fixed by the manufacturer, but sometimes they only have a 90 day warranty.
Sam's Club locations accept Sam's Club and Walmart credit cards, Discover Card, MasterCard, debit cards (PIN-based, except MasterCard, which also can be signature-based), Walmart and Sam's Club gift cards, cash or checks. As of March 2009 EBT SNAP benefits are accepted.