onkyo resale value

Can anyone give me a value for the following?.....

*
Remote Control Transmitter - Model #RC-815
*
Quartz Synthesized FM Stereo/AM Tuner - Model #T-4140
o
Black In Color
o
Approx. 17.5"x9-3/4"x2-3/4"
o
FM/AM 16 Random Preset Station
o
Auto/Manual Tuning System
o
Serial #7708007244
*
Infrared Wireless Remote Controlled Stereo Preamplifier - Model #P-3150V
o
Selective Tone Control
o
Audio/Video Control System
o
Simulated Stereo Option
o
Black In Color
o
Approx. 17"x9.5"x4"
o
Serial #1708018233
*
Delta Power Supply Circuit Design Stereo Power Amplifier - Model #M-5130
o
Serial #1708012758
o
Black In Color
o
Approx. 17"x9-3/4"x5-3/4"

Is all this stuff Onkyo? ... I don't have a clue what you have other than a bunch of model numbers.

Maybe a few photos would help. All those serial numbers don't help much either.

good luck