Hi Sam,
If the products you sell on eBay is not working for you on Amazon, try checking out what people have been buying on Amazon.
To do this, you need to go to the Amazon website. Choose Shop by Department and select a Category, then select each Sub-Category to know which products are saleable. It’s easy as Amazon’s already done it for you! They’ve already labeled a couple of their items as #1 best sellers. This will give you an idea of what spenders actually need and want. Point is, think of a unique item that can almost match what they already chose as “best”.
But don't just stop on Amazon. There are other online selling platforms to sell to. The link below will give ideas on alternative places to sell apart from eBay. It gives reviews as well so you'll find it easy to decide where to go next.
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Below are some dropshippers you may want to deal with:
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Hope this helps.