If you're still interested, I found the Onkyo TX-840 listed in the Oct. 89 issue of AUDIO. 70 watts/channel into 8 ohms, 90 into 4, listed for $380.00.
I still have a 1988 Onkyo bottom-feeder cd player that works ok, but does require a slap once in awhile to keep from stuttering!
On a slightly off-topic note, here are the '89 list prices for the Heritage speaker line (per pair):
K-Horn - $3488
Belle - $2858
La Scala - $1876
Cornwall II - $1628
Chorus - $1630
Forte II - $1298
Heresy II - $928