Amazon arbitrage sourcing

I am looking for an experienced assistant in Amazon arbitrage sourcing. Our goal is to find products to resell with a profit margin of 10-20%. The shop's origin should be Germany. I expect a minimum ROI of 21-30%. This project requires skill and experience in online retail and ecommerce. The successful candidate should have knowledge of sourcing product for selling on Amazon (German Marketplace) . The right person for this job should be comfortable working independently and with minimal supervision.