Mass produced fiction books

Hello! I am fairly new to Amazon and reselling in general, have had a good amount of success last 6 months in EBay, but haven’t had any luck in Amazon, gated in a lot of things, and what I’m not gated in, the sales seem very low but don’t know if I’m looking at things right,

I’ve been selling on eBay: Books fiction/non fiction Video games Dvds And anything I can get on Facebook.

I have a TON of fiction, probably mass produced books that I’d love to list on Amazon, I feel like Amazon might be better for that. Now I do know that the profits are a bit low, but I get them absolute free of cost but I wasn’t sure if there’s hidden fees that’ll eat the 1 or 2 dollar profits. I do not have the professional account I have the free one still.

I don’t want to just throw them out, I’d rather get the buck or 2 profit to put towards higher profit items

Open to any suggestions