Quick answer: Read a used medical equipment listing field by field, not as a sales pitch. Each field, serial number, photos, condition statement, accessories, service history, and refurbishment detail, should contain something specific. What is missing matters more than what is present. The biggest red flags: no serial number, stock photos only, a price far below market with no explanation, no accessories listed, and a vague "refurbished" claim with no detail. A device that powers on is not automatically