Amazon Consumer Class Certified Over Third-Party Pricing: What Sellers Need To Know
A federal judge in Seattle certified a nationwide class that could include about 288 million U.S. consumers who purchased five or more new items from third-party sellers on Amazon since May 26, 2017. Below, AMZ Sellers Attorney® explains what this means for pricing rules, fees, and the Buy Box, and what to do next.
What The Court Did
The court certified a nationwide consumer class in the case De Coster et al. v. Amazon.com, Inc., Western District of Washington, No. 2:21-cv-00693-JHC. Plaintiffs claim Amazon restricted third-party sellers from offering lower prices on rival sites while also selling on Amazon, which they say raised consumer prices by enabling higher fees. Amazon denies wrongdoing and has appealed the certification order.
Class certification does not decide liability. It allows the case to move forward on a class basis, expanding discovery and potentially increasing settlement pressure or leading to a merits trial.
Who Is In The Class
- U.S. buyers who purchased five or more new goods from third-party sellers on Amazon on or after May 26, 2017.
- The class is nationwide and involves billions of transactions.
Where The Case Stands
- Certification was issued under seal on Aug. 6, 2025, and later unsealed.
- Amazon has noticed an appeal. Absent a stay, class procedures may continue while appellate issues are addressed.
Why Sellers Should Care
Even though consumers filed the case, the core issues touch seller pricing freedom and platform rules:
- Pricing parity scrutiny: If platform policies that discourage lower off-Amazon prices are limited by future rulings or settlements, sellers may have more room to differentiate prices by channel. Amazon disputes the claims, and its current Fair Pricing policies still apply.
- Fee pass-through spotlight: Discovery may explore how referral, FBA, and advertising fees relate to landed price and Buy Box outcomes.
- Operational uncertainty: Appeals can take months. Sellers should prepare documentation and compliance playbooks now.
Risk Map For Marketplace Operators
Channel Pricing Strategy
- Document neutral reasons for cross-channel price differences: shipping speed, returns handling, warranty, or service levels.
- Avoid any agreement with competitors or partners that suppresses discounts off-platform.
- Keep Minimum Advertised Price (MAP) policies distinct from platform pricing rules. The legal standards differ.
Buy Box and Fair Pricing Readiness
- Model how off-Amazon discounts might trigger fair pricing flags on Amazon.
- Track how referral, FBA, and ad spend contribute to the featured offer price. Maintain reports that show consumer benefits and compliance.
- Keep notes explaining price differences by channel tied to costs and service levels.
What To Do Now: Seller Checklist
- Audit pricing governance: List where you mirror, cap, or restrict off-Amazon prices. Record business reasons for any differences.
- Update playbooks: Build promotion decision trees that weigh Buy Box impact versus multi-channel goals.
- Preserve records: Retain pricing logs, fee reports, and communications about parity or fair pricing. These are often relevant in discovery.
- Get counsel early: Antitrust questions are fact-specific. A short consult can prevent costly mistakes.
This article is for education only and is not legal advice.
Questions about pricing parity and antitrust risk? Free consultation
Sources
Primary coverage and court references discussing the certification order and class definition. See national wire services and the W.D. Wash. docket for filings in De Coster et al. v. Amazon.com, Inc.
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