S$39,800 is above your recent used-market median of S$36,007 and also sits over the 75th percentile at S$37,908, so this reads as an ambitious ask, not a bargain. For a like-new example, that premium can be justified only if the rest of the package is unusually strong.
The upside is that this is a well-loved statement speaker: the UNO SD is known for its big, effortless scale, horn dynamic snap, and room-filling presence, so a clean unit can be a genuinely special buy. If it’s truly like new, with original packaging, grills, spikes, and ideally a careful single-owner history, the price is easier to defend; without those extras, I’d still negotiate, because at this level you want the full, well-kept ownership story.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.