I have a Dual Rectifier Solo 3 Channel head that I am looking to possibly trade with someone for a Mark IV medium or long head. Mine is in near mint condition with original cover, foot controller, and cable. Also has just been retubed with tubes from Doug. I would prefer to trade with someone near me (Charleston SC) and would be willing to drive to meet you halfway or possibly drive the entire distance if it is not too far. PM me or post here if you're interested.