Official Protocol

Marketplace Guidelines

Follow these core protocols to ensure a safe and transparent automotive trading experience.

Last Updated: March 17, 2026
Welcome to C9x

Welcome to the C9x Marketplace! To ensure a safe, transparent, and successful experience for everyone, please follow these core guidelines when browsing or listing vehicles.

Honesty is Key
  • Ensure all listing info (engine, mileage, features) is 100% accurate

  • Intentional misrepresentation is grounds for immediate suspension

  • Disclose any minor accidents or cosmetic repairs

  • Verify the V5C/Logbook details before listing

High-Fidelity Photos
  • Upload clear, well-lit photos of the interior and exterior

  • Include shots of the engine bay, tire treads, and dashboard

  • Avoid using stock images or heavily filtered photos

  • Capture any specific areas of wear or damage

Safe Inspections
  • Always choose a public, well-lit location for vehicle viewings

  • We recommend bringing a friend or a qualified mechanic

  • Verify the seller's identity and vehicle documents in person

  • Never send deposits before a physical inspection

Secure Communications
  • Keep all initial negotiations within the C9x secure chat

  • Avoid sharing personal contact info too early in the process

  • Report any suspicious behavior or "too good to be true" offers

  • Document all agreed-upon terms within the platform

Transactions & Payments
  • Vehicle payments are handled directly between buyer and seller

  • Use secure bank transfers for large amounts where possible

  • Ensure you receive a signed receipt and all vehicle keys

  • Off-platform transactions are at your own risk

Community Trust

Our marketplace thrives on mutual respect. Please honor viewing appointments and respond promptly to serious offers to maintain a high community rating.

For any inquiries regarding our policies, please contact legal@c9x.com