I have found a Mutoh printer that the owner is selling as is.  It was said that a power surge occurred, and now it flashes "CPU ERROR".  She says it needs a main board now.  I also assume print heads since it has sat.  What all would I need to replace in anybody's opinion to get this thing up and working.  What would be a reasonable price to pay for such a unit - knowing I am going to have to spend money to make it work.