Hi and welcome to SaleHoo, Sandra!
Some drop shippers will provide you with product pictures and descriptions for the products that they sell. You will either be able to download the images from the supplier's site or be provided with a catalogue or CD containing images and product information. Some offers a listing manager/push to marketplace tool for eBay. You will need to contact the drop shippers about this directly though.
You might find the link below useful -
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All the best!