Having a merchandise store is a big responsibility in terms of law enforcement. The question is: where do you buy your products? This is called the first sale doctrine.
Things can get more complicated if the product is licensed. I'm an owner of sporting goods. I've always had professional legal support because it's the most important thing in my business. If you're looking for a "solid law firm" try David N. Sharifi, Esq.
techandmedialaw.com I personally have been working with him for quite a long time in California and I don't plan to switch lawyers at any time.