The Nikko STA-7070 is a handsome, capable mid-powered vintage receiver, but US$478 is ambitious rather than a bargain. Comparable used examples have sold or been offered around US$299–US$427, with working examples commonly landing closer to the low-to-mid US$300s. At this price, it should be exceptionally clean, fully tested, and preferably serviced; otherwise, negotiate toward roughly US$300–US$350.
Its appeal is real: the 43-watt-per-channel output is plenty for an efficient-to-moderate room system, and the walnut-style case, aluminum fascia, strong tuner, useful filtering, phono input, and straightforward controls give it genuine enthusiast charm. The design is well regarded for clean, lively sound and solid construction. Still, this is an old receiver, so verify both channels, tuner reception, lamps, controls, speaker outputs, and phono operation; without clear service evidence or unusually excellent cosmetics, US$478 pays a premium.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.