man one of those fabled pre-gibson models.
Seriously though people are starting to aim for the moon for any version of the IIC+, including the 60 watt combos. Not that they are bad amps, far from it, but people often list them as the metallica tone and expect the bucks to roll in. The production background and differences on those heads can be convoluted and the seller either doesn't know that or is hoping the buyer is unaware of that/won't care.
I love my IIC+ but 4500 for a combo is...excessive.