For sale Genz Benz Streamliner 600

Genz Benz Streamliner 600 possibly up for grabs. This is my all time favorite amp, but I have a couple of them. That said, they are getting harder to find, so I am hesitant to let it go. Serviced and checked out not too long ago, and given a clean hill of health. Genz gig bag also included. Asking $600 shipped conus. As far as trades go, I like 4 stringers (especially p basses), maybe a different amp head, or maybe a nice tube pre or di.