SX-1980, Pioneer’s most powerful receiver ever. The SX-1250 is considered my many to be the better model. It might also be good to remember that the prices on these when new were not cheap. The SX-1980 in 1978 sold for $1295. The SX-1250 in 1976 was $900. You could buy a new car then for $3500. It’s just supply and demand, there’s a finite number of these available, and a fair number of folks that can now afford their dream piece that was unaffordable to them back in the day.
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