Most people would have nothing to barter with.Yeah bingo. A barter based economy would only work with a tiny number of participants. Say an island with 100 families. Any larger and it becomes so inefficient it would likely collapse.
I don't come across many people that grow their own vegetables. More that fish and a few that hunt.
My mates that don't hunt or fish would have no idea how to butcher an animal or fillet a fish , never mind sharpening a knife. Therefore, they wouldn't have much to trade for my snapper.
Sadly, most fall into that category. Men generally are not hunters and gatherers anymore, just financial providers.