The biggest concern most beginner sellers have regarding retail arbitrage is whether or not it’s legal. However, if you have been wondering the same is Retail Arbitrage legal, you can put your mind at rest because retail arbitrage is perfectly legal and is a great help selling on Amazon. According to the U.S. Supreme Court, retailers can’t stop anyone from reselling their products as long as the merchandise has been acquired legally. So basically, all you need to practice retail arbitrage is your receipt from the store where you bought the stock.  But, keep in mind that just because it’s legal doesn’t mean it comes without challenges.  You may face many problems if you decide to sell branded items. Although legally, there is nothing to stop you, if you are not an authorized reseller, some brands could try to intimidate you to get you to stop commercializing their products.