The IIC+ is the same as any of the older marks, you could get it with or without options ie- reverb, GEQ, simul-class, 60/100, hard wood cabinet. The more options the more it's worth. As far as how much one is worth, it depends on who's looking (and willing to pay) for them that week, but they are usually from $1k (basic model) up to $3k (fully loaded hard wood).