1P vs 3P on Amazon | What’s the Difference? Choosing a 1P vs 3P selling model is integral to your Amazon business, so you must choose the best option. With 1.9 million Amazon sellers, it’s no wonder why so many e-commerce companies choose the online shopping giant to list their products. Amazon offers flexible solutions for businesses to sell, store, and ship items. But if you’re a new seller, choosing between 1P vs 3P on Amazon can be confusing. What do these mean? And how do they di...