Product listings gone

Hi there, I have been researching a product for 2 months. I checked the product recently and noticed that the top 10 sellers have gone. I have used all the main keywords and none of them are showing anywhere on Amazon. I saved all the relevant information on these sellers. When I click their links or paste in their ASINs I get page cannot be found. One month ago they were all there selling well. Sales for the new top 10 sellers are weak at best. It is a toy that uses batteries and the models from the top 10 previous sellers all looked very similar. I am ready to choose my supplier but until I find out why this has happened I’m not committing to this. Does anyone have any idea what the issue could be?
Thank you