Used Goods Marketplace Development

I need a marketplace similar to Kleinanzeigen.de for listing used goods, specifically cars and vehicles. The platform should require user accounts for both listing and purchasing items.

Key Requirements:
- Platform for buying and selling used goods, with a focus on vehicles
- User registration system for both sellers and buyers
- User-friendly interface

Ideal Skills:
- Experience in eCommerce and marketplace development
- Proficient in UI/UX design
- Knowledge of secure user registration systems