1. Determine your niche: Before you start sourcing wholesale products, it's important to determine your niche. This will help you focus your search and find suppliers who specialize in your area of interest.

2. Find reliable suppliers: One of the most important steps in sourcing wholesale products is finding reliable suppliers. There are many online marketplaces and directories that can help you find suppliers, such as Alibaba, ThomasNet, and Global Sources. Be sure to check the supplier's credentials and reputation before doing business with them.

3. Negotiate prices: Once you've found a few potential suppliers, it's time to start negotiating prices. Don't be afraid to ask for discounts or better terms, but also be prepared to compromise. Remember, a good relationship with your supplier can lead to long-term benefits.

4. Manage shipments: Shipping can be a major headache when sourcing wholesale products online. Make sure you understand the shipping terms and costs upfront, and consider using a freight forwarder to manage the process.

5. Build relationships: Building strong relationships with your suppliers can help you get better prices, faster delivery times, and access to new products. Be sure to communicate regularly and treat your suppliers with respect.

In conclusion, sourcing wholesale products online can be a great way for USA buyers to access a wider variety of products and save money. However, it's important to take the time to find reliable suppliers, negotiate prices, and manage shipments effectively. By following the steps outlined in this guide, you can successfully source wholesale products online and build strong relationships with your suppliers.