Used Watson Marlow 520U/530U Peristaltic Pump Price Guide

Market Valuation by Listing Type

Median is the primary statistic — used clinical pricing is full of outliers and the median ignores them.

Per-Source Benchmarking

Methodology

Clinical Asset Index aggregates listing data from eBay, GovDeals, DOTmed, HiBid, LabX, and PublicSurplus daily. Each listing is classified by type (complete system, major module, part / accessory, for parts / repair). Medians and ranges are computed only within peer groups — a complete system is never averaged with parts. Confidence thresholds: comps ≥ 0.65; deal-feed device-match ≥ 0.75 and classification ≥ 0.65. Median is the primary statistic; the mean is shown only as a small secondary number because outliers dominate this market. Data is directional — always verify independently before purchase. Read full methodology →