I want to create an E-commerce platform for a big mart for online sales and delivery service. I don't know how to construct the negotiations.
I think the first step is to create the website and make the design attractive. Then the next step is to advertise your site. you can run sponsored ads on social medias,Google and forums.As a starter don't charge the vendors,only request for commission for any product they sell through your site.create avenue for sales agent or afflilates to help increase sales and let the commission be attractive. Payment options should be easy and include CryptoCurrencies and other modern means of payment.
You can prefer following approaches.
You must give them a good reason to come, For Example let them know how the store can get more exposure via your website,
Let them know about your Web site is to become active in several of the thousands of Internet news groups and mailing lists.
Let me know if you need any further assistance
Let me share you a good example of sales and delivery service site: www.carid.com
If you think that's something you are eyeing on.. message me..