Honestly $3200 seems high if frame welding needs to be done. It is actually really simple, if you know what you are doing. The complexity goes up if the bad welds are between the frame and body is it will need to be lifted off to repair it. If the metal is also degraded (likely) it will need to be gusseted as well. Most people do not and when they hear about anything frame related they are inclined to just walk away. Without pictures I would be more inclined to say part it out, or get the frame issues taken care of before selling it.
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