Type-level market taxonomy distinguishes between imaging, electronic devices, surgical instruments, patient support, and consumables. Imaging—covering pre-owned MRI, CT, X-ray, and ultrasound—dominates value because secondary purchasers focus on high-ticket assets offering 5–7 remaining years of life. Electronic devices (patient monitors, ECG, pulse oximeters) exhibit the highest velocity; they depreciate faster yet retain calibration integrity, enabling 2–3 resale cycles. Surgical instruments, particularly laparoscopic and orthopaedic handpieces, trade on instrument-specific reprocessing standards, generating margin through refurbishment rather than core technology. Patient-support equipment (beds, stretchers, ventilators) follows hospital construction cycles, with demand spikes during surge-capacity events. Consumables such as refurbished endoscopic accessories or surgical staplers occupy a niche constrained by single-use conversion trends. Collectively, the type matrix frames procurement strategies that balance acquisition cost, regulatory risk, and clinical longevity across the Used Medical Device ecosystem.