Hey! Thanks for this opportunity. A good e-commerce website where sellers can sell their product should include:
A nice appearance since that is the first look and it generates first impression,
Second, it should have good features like inventory status, report generation and downloading, easy payment methods, message and live chat support system, price comparing,
Third, mobile friendly design so your website is easily available on any mobile device,
Fourth, SSL integration for building trust in customers,
Fifth, SEO friendly design so your website get good attention in search engines.