I need some advice on how to price single or as a set. Marantz 2252 receiver, 140 power AMP, HD 880 HD 660 and 7000 speakers. I also have a Denon DP 1200 AR DD turntable, Klipsch Heresey Slant Monitor (Birch), Realistic STA 85 receiver and a Sherwood ST 901 turntable