Amazon Listing - I need some listing on amazon

Dear Freelancers, I have around 200 vendors with 500-1000 list of products per vendor need to be listed to amazon. This is for 500 listings product work for $100 The work of listing required Some one who : - Experiences Amazon Lister are preffered - I need some on time work deadline person , i am not tolerate delay. - Can understand proper grammar structure of english. - Understand somewhat keyword creation. - understand on create new product on amazon , listing on existing listed product and restriction rules on amazon. The work pretty simple , you just need to input necessary informations of products and list it. I will invite the freelancer to seller central so they can have limited access to help me to listing our vendors products. The product should have proper description , images , listing price , some necessary information of products and some description ,UPC , SKU etc ... Some product will use new UPC (i will provide it) , unless it is listed on amazon. The work only will be paid after 75% work done since this is a basic data entry so i need some work done before i can pay freelancer. You will be invite to our seller central account so you can listing on our account. Please do not try modify any setting because there are several user on the account. We will working together using voip ,text message or messenger. Proof of your work will be your best ticket to be my candidate. Thank You