You should be able to find a Sansui here on Audiogon. They're not that rare.
Sansui recievers are almost always available on ebay but the usual warnings apply. Sansui produced a lot more integrateds and tuner combos or so it seems. You can get an excellent AU717 amp for less than $300. If you aren't to fussy they made some later digital tuners the T-60 and T-80 that sell for a lot lot less than the TU series of analog Tuners typically only about $40-60.
The best of the black face 70s vintage gear might be Nakamichi although the 600 series was slant shaped. An underappreciated company from that era IMO was Nikko which came in silver or black. You should keep in my mind the the black face also heralded the end of that particular quality era when Japanese manufacturers started to outsource to the rest of the Pacific rim. Thus, for instance, Pioneer collectors seek mainly the Silver period pieces.
BTW One big name that was almost always black is McIntosh but good examples one of their few recievers go for insanely big money. The only exception might be a 1500. Recently I have seen "mint"/excellent examples of the 4100 go for over $1200.
Follow Up Question: Any quality/repair warnings regarding receivers from Sansui? Their 70's / early 80's "look" seems most pleasing to me (plus the multiple colored lights are amusing and fun against the black)...Their tuners/amps in black are also attractive...Also, if I am running either Jamo E700s (little guys) or my bigger Rega R7 speakers with a California Audio CL-10 CD player, how much power do I need to seek in one of the vintage receivers?
Which retailers of vintage (Sansui) do you guys like? What boards (besides this one) should I follow? Thanks!
Yogiboy, LOL! Man, that brings back a painful memory...
Back when Lynn Swan made one of his amazing athletic catches with the Steelers - can't remember what game - I was visiting my grandparents who had a porch with a railing on a short but steep sloped hill out front.
I was so pumped by Swann's catch that I rushed outside to imitate him. Standing before the railing and slope I called out to the world, "LYNN SWANN," and leaped over the railing intending to land on the hillside.
I almost did it, but my back toe caught the top of the railing, throwing me off balance. I landed on one foot on the downside slope and severely rolled my ankle! OOOOWWWW!
One of the most painful moments of idiocity in my life! I hobbled around for days and days.
But Swann's catch was magnificent! :)
Regarding audio receivers, I had a really cool black Sansui receiver with "tab" buttons having orange illuminated highlights, which I wish many times I still had. Sansui is not a bad option for nostalgia receiver.