I found an Onkyo M-501 amplifier, P-301 Preamp with T-401 Tuner, DX-C104 cd changer and a TA-RW303 dual cassette deck........... in near mint conditon with Audioquest cables, manuals and Onkyo rack with glass door, picked it up for $100 are the amp and preamp decent........they sound good but wondering if anyone else has had any experience with them?