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The asking price of US$1,450 is ambitious, sitting well above the 75th percentile of US$1,169 and significantly higher than the median of US$997 from your recent comparable listings. While vintage pricing for this 1987 Onkyo Integra M-504 has been trending upward, with some forum data suggesting a typical range of US$400–US$600, your internal ground truth firmly anchors the fair market higher; however, US$1,450 still exceeds even your top percentile, making it a tough buy unless the condition is exceptional.
This dual-mono, 165W-per-channel amplifier remains well-regarded for its robust power and genuine vintage sound, offering meaningful upside if found in original-owner condition with all accessories. Since the price is ambitious and the condition is listed as unknown, buyers should verify for common age concerns like capacitor degradation before committing, as this is not the bargain opportunity it would be at US$900 or below.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Onkyo traces its roots to postwar Japan, founded in 1946 in Osaka by Takeshi Goda, an engineer at Matsushita Electric who envisioned high-quality Japanese loudspeakers. Initially established as Osaka Denki Onkyo K.K., the company began production in 1948 with the acclaimed ED-100 speaker featuring a 25 cm driver, quickly building a reputation through LP concerts and innovative designs that resonated with audiophiles.
The brand excels in premium home audio, renowned for AV receivers, hi-fi amplifiers, and surround sound speakers that deliver exceptional clarity and power. Its portfolio spans turntables, DACs, headphones, and cables, bolstered by acquisitions like Pioneer's home electronics division in 2015, enabling cutting-edge integrations such as internet radio and high-resolution streaming.
Onkyo holds a solid mid-tier position in the hi-fi market, prized by discerning buyers for reliable performance and value rather than ultra-high-end exotica. Despite bankruptcy challenges in the late 2010s, its revival under new ownership preserves a legacy of technological innovation and pure sound enjoyment, appealing to both vintage enthusiasts and modern home cinema setups.
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