Timing matters a bit here: this is a well-regarded tonearm from an established high-end era, not a commodity item with a fast replacement cycle, so condition and completeness matter more than age alone. At €4,300, it sits above your EUR used-market median of €2,967 and also above the €3,806 75th percentile, so this is ambitious rather than fair value.
That said, if the arm is genuinely clean and complete, the appeal is easy to understand: Argento’s FLOW line is prized for low coloration, strong mechanical execution, and the kind of resolution that suits a serious analog front end. A good used example can be a smart buy for someone chasing a top-tier arm without paying new-money pricing, especially if it includes the original box, mounting hardware, and any proprietary parts. At this price, I’d want evidence of careful ownership and no missing accessories before pulling the trigger.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.