I checked Costco and they didn't have my battery. Thought about going to Walmart, but then I saw Consumer Reports review of my battery size. Then surprise surprise, I found out that Home Depot carries Exide batteries. Who would have known. They are very well priced, and the battery has very good capacity for the cost and a 40 month free replacement. The core exchange was a little weird, as I don't think even their employees, know what to do. Just take it over to the customer service desk, to get the core refund. I would probably still go with Costco, because they have Interstate batteries at ridiculous prices, but this is a good alternative when they don't carry your size.