ebay lister needed to list 1000 items

I have inventory of 1000 different items across all types of categories that need to be listed on eBay. You will have to do the following for each item: 1) I will provide image(s) of each item that includes the UPC for you to use in the listings. 2) I will provide quantity to list. 3) You will need to use the UPC provided with the image(s) to find identical item on eBay to use the information about the item that's already available from eBay to list the product. 4) You will use a set template to list including my policies that I will provide to include in the [login to view URL] will use the price suggested by eBay when you find the identical item as well as use the "best offer" function to include with each listing. You can quote me on a per item basis or flat rate. I will not be able to provide you with my login details for eBay for security purposes. In order for this to work, you will need to use a 3rd party software to create the listing that I can also obtain so that you can provide me with the file and i can upload to eBay through the third party software using my login. My understanding is that there are a few bulk lister 3rd party softwares available that have this functionality. It would be beneficiary if you have experience in using such software and suggest which one to use. Looking for an extremely efficient and reliable lister. I may have more products to list if you can do this successfully.