Retail company (consumer electronics) seeks merchandise management system with Amazon interface

We are a trading company in the field of consumer electronics and would like to support our processes with software. Larger quantities are also to be traded via Amazon.

We are looking for a merchandise management or trading system with the following requirements:

• Cooperation with Amazon: automated invoicing and Amazon warehouse
• Larger quantities are also to be traded via Amazon
• Invoicing, accounting
• Datev interface (optional: financial accounting)
• Optional: goods import (planned)
• Windows compatible

Only one workstation is planned for the time being.