> why are most open-access papers under $3000? Ordinary scientific journals don't have reviewers in paid staff. An editor sends an article (without reading it)

> why are most open-access papers under $3000? Ordinary scientific journals don't have reviewers in paid staff. An editor sends an article (without reading it) to 2-4 non-paid reviewers, and makes the publish / don't publish decision based on the reviews. Also the editor is not paid, either.