you could try to sell it in your area. drive to meet someone half way so a shipper does not touch the box. it is worth trying.
if you have to ship I would still put something around the outer box. when I sold my last amp I double boxed and then put a very dense cardboard (that I got from work - 1/8" thick) in front of the box where the faceplate is as well as dense cardboard corners on the front and back, top and bottom strapped to the box. this is good protection in case of the box getting dropped or something poking the front.
to some extent you want to protect the boxes themselves as it adds to the overall value and (obviously) the amps thmeselves would be protected
good luck
if you have to ship I would still put something around the outer box. when I sold my last amp I double boxed and then put a very dense cardboard (that I got from work - 1/8" thick) in front of the box where the faceplate is as well as dense cardboard corners on the front and back, top and bottom strapped to the box. this is good protection in case of the box getting dropped or something poking the front.
to some extent you want to protect the boxes themselves as it adds to the overall value and (obviously) the amps thmeselves would be protected
good luck