What do you mean 'headphone system'? Just a set of headphones like Beats, AKG, Sony, etc.....or other hardware?
Yeah! I have enough old school gear to set up a few systems.... Everyone want's Bose (junk) type stereos/speakers when nothing compares to old-school stuff. I hit up local thrift stores, estate sales, garage sales, etc.... to find stuff. Though gear is getting much harder to find nowadays, it's still a fun hobby! I wish I knew how to actually fix some of this stuff and that I had more room!
I just sold a really nice Kenwood silver-face stereo system recently. The new owner said it was beautiful and very nostalgic for him and that he was having it buried with him when the time comes, lol. ....and it was nothing rare/exotic like some can be, just in excellent condition.