1. Know your needs: Before you start shopping for wholesale products online, it's important to know what you need. Make a list of the products you're interested in and the quantity you need. This will help you narrow down your search and find the best deals.

2. Find reputable suppliers: There are many online marketplaces and directories where you can find wholesale suppliers, such as Alibaba, ThomasNet, and Worldwide Brands. However, it's important to do your research and find reputable suppliers who have a proven track record of providing high-quality products.

3. Read reviews and ratings: Once you've found potential suppliers, read their reviews and ratings. This will give you an idea of their reputation and the quality of their products. Look for suppliers who have a high rating and positive reviews from previous customers.

4. Beware of scams: Unfortunately, there are many scams and fraudulent suppliers out there. Be wary of suppliers who ask for upfront payments, offer deals that seem too good to be true, or have poor reviews and ratings. Always do your due diligence and research before doing business with any supplier.

5. Negotiate prices: When buying wholesale products online, it's important to negotiate prices. Don't be afraid to ask for discounts or better terms, but also be willing to compromise. Building a good relationship with your supplier can lead to long-term benefits.

6. Consider shipping costs: When comparing prices, be sure to factor in shipping costs. Some suppliers may offer lower prices but have higher shipping costs, so make sure to compare total costs before making a purchase.

In conclusion, buying wholesale products online can be a great way to save money and access a wide range of products. However, it's important to shop smart and find reputable suppliers, avoid scams, and negotiate prices. By following the tips outlined in this guide, you can shop smart and get the most out of your wholesale purchases online in the USA.