Anyone have a copy of quark xpress they no longer need?

Long story short - I have quark 6.0 documents I need to open. I've read 9.0 will open them but I'm not sure if 9.0 will run on Mac OS sierra

I was looking into getting 2015-2016 off eBay
But I then need a file converter to get them open

Anyone have 9.0 or higher?
Tia