Does anyone have idea what I can do with an old Pioneer LaserDisc player? Is there some shop that may purchase, or a charity where I can donate?

target practice

Try ebay, I unloaded a Pioneer laserdisc player plus a whole bunch of discs a few years back.

The discs actually tend to be worth more than the player, certain titles have a cult value

I donated mine and 200 disc's to the local temp charity ..