Before you can compete for the Buy Box, you must meet these baseline "hard gates":

: Fulfillment by Amazon (FBA) is the most reliable path because it guarantees Prime eligibility and fast shipping. Seller-Fulfilled Prime (SFP) is also highly competitive but requires near-perfect shipping metrics.

: You must be on the $39.99/month plan.

: Must stay below 1% . This includes negative feedback, A-to-Z claims, and chargebacks.

: Only "New" condition items are eligible for the main Buy Box (Used items have a separate "Used Buy Box"). Critical Winning Factors for 2026

: Offers with same-day or next-day delivery see an estimated 18% higher win rate than standard shipping. Delivery speed now reportedly accounts for 25–30% of the algorithm's weight.