The TDAI-3400 is a notable integrated amplifier, but at €5,799 it sits above your recent used-market median of €5,327 and also above the 75th percentile at €5,614, so this is ambitious rather than a fair-market ask. For a used listing, that premium only makes sense if it has something genuinely special behind it, like exceptional condition, strong provenance, or a meaningful accessory bundle.
What makes it worth a look is the Lyngdorf’s reputation for clean, controlled sound, excellent room correction, and an all-in-one design that can replace a stack of separates for the right system. If it’s complete and cosmetically excellent, it may still suit a buyer who wants this exact platform and is paying for convenience as much as performance, but I’d want evidence of originality, accessories, and careful ownership before treating €5,799 as compelling.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.