Does the GPSR also apply to second-hand products?

In principle, yes. The GPSR also covers used, repaired, or refurbished products, provided they are supplied to consumers in the course of a business. Products that need to be repaired or reconditioned before use and are labelled accordingly are excluded — for example, clearly identifiable parts or items sold for spares. Commercial sellers of second-hand goods should therefore take the safety and manufacturer disclosures just as seriously as for new products. Purely private sales between consumers, however, fall outside the regulation.