Is it worth listing on Amazon without offering prime shipping?

Is it worth listing on Amazon and offering merchant fulfilled shipping? When I searched for my product, I noticed that almost all the top listings are offering PRIME shipping (free two day shipping) I’m not sure HOW they’re doing this, since UPS 2nd day air costs $12 – $25 and the product only costs $18 – $30 so it seems like they would make a loss. Do customers even purchase non prime products anymore?