It looks like it is either a IIC+ or a IIC (maybe modded to a C+). I wonder if it has the simul/Class A switch on the front (which i've seen before). I am only guessing about the simul part though... but I would think that if it was the 100/60 model, that he could have just read that on the front, and not have said "50/110." Assuming that it is a fully loaded C+, 2.8K is a pretty good deal since they have been going for much more on ebay recently. However, I think that if it's a modded C+, than its overpriced IMHO. Rabies if you are interested in the amp, I would ask for the serial number, then cross reference the serial number with the information on Boogiebabies' IIC+ "guide" (see my signature for the link). I would also ask if it has Simulclass and/or reverb.