This is a yes and no answer for both sellers and buyers. The answer depends on the item.

eBay has more audience it is a global platform the has grown in the last few years, while the Facebook marketplace is more local and didn’t arrive at global sales.

Facebook marketplace is faster but possibly less money to sell. 

On the other hand, it’s better for buyers, more accessible.

eBay, may take longer delivery, the products you’ll get the exact price you want as a seller it a buyer.

eBay has more options and variations, while on Facebook you won’t find the exact product you are looking for.

Facebook has no fees, while eBay charges a fee for selling and PayPal charges a transaction fee.

Again it all depends if you are a seller or a buyer and what is the specific item.

Facebook has the largest audience than amazon.

Facebook is the platform that has the largest audience more than amazon. The problem is that the Facebook marketplace is very hard to sell because many Facebook users don’t use the marketplace platform and prefer to buy on Amazon or eBay. So the best idea is to sell on multiple platforms. In Triplemars platform you can sell the same products in multiple destinations, and now you can gain more audience that watches your products. And you don’t take any risk because if your store got blocked you have other stores on other platforms. Therefore this is a win-win situation so we recommend to every Triplemars customer is to keep their business in multiple destinations to minimize risk and to be a bigger seller

Last important point, we talked about Facebook marketplace speed. Very easy to use and fast another thing that makes Facebook marketplace so special is the money that you pay to them every month, cheaper than eBay and Amazon, so selling fees estimate to be cheaper