Vintage Hart Acupad electronic drums - $400 (Redding)

I have a 5 piece electronic drum set by Hart.
These are labeled "Acupad" with 4 pads (snare and 3 toms), kick pedal pad, hi-hat pedal and pad, ride cymbal pad and one crash cymbal pad.
I got these in a trade and have zero experience with them.
I of course looked these up online and couldn't find much info, but I found the Roland TD-6 sound module on ebay which goes for $150-$200ish by itself.
All of the sound gear shown in the pictures came with it so I'm passing it along as well.
There's a Marrantz receiver, Yamaha surround speakers and sub, Advent floor speakers, 2 JVC pieces etc.
Everything powers up but I haven't tried to hook it all up.
Asking $400 obo for everything.
Call or text (leave message).
Thanks *530 *227 *707three