Ok I have an ebay deal going south. I shipped a Marshall 100 watt all tube head to Hawaii. The box came beat to crap and the guy said the amp doesnt work. I personally played it the day before I sent it out and its always worked flawlessly. He got insurance on the head but instead of looking into the insurance he got rid of the box, put all new tubes in there and is taking it down to his repair shop. Did he just negate the insurance? Also he said the power tubes were bad and I had those replaced a couple months ago. He said there is a black ring around them. Could that have been caused in shipping. I also play that thing a literal 20 hours a week. would that just be normal wear? Thanks so much you guys are awesome!