How many sales can i expect per $100 ebay sponsored listing

Hey there. I'm looking to get an estimate about how much sales i should expect per about $100 i spend for a sponsored listing on ebay. I do other things right now but looking to experiment and see if i can build an account up there for some extra money. Any experienced sellers on here? Also should i expect some reviews if so how many?

I do not use ebay but the only thing I would say is just test it with $100. Since I think it would be different for other people, products etc. its all about how you present your product

U should make a realiable ebay store, get some reviews first and than with 100$ u may get a lot of sales, but it depends in the product too.