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Just a quick tip, but with many smaller, cheaper products (< $30 or so), the manufacturer will just send you out a new one if you have a problem, no questions asked. Maybe your order from Walmart was missing pieces or one of the pieces was broken. Just go to the manufacturer's website and send them an email explaining what happened. Products like office supplies work well for this. Along with making the most of your product's warranty, definitely leverage this for products you already buy. Worst they will say is no and it saves your ecommerce accounts from another return or DNA. You can also do this for food products and they'll likely send you a coupon in the mail.

Also, products with "money-back guarantees" can be good, especially products that cannot be sold again after being returned like worn clothes, food, supplements, etc. Make sure you read the fine print though. Some Koss headphones have a "Lifetime warranty" but you have to pay to ship the product back, and pay a repair fee that goes up every year, which has gotten to the point where it's barely worth it for a pair of $40 headphones.