What's the price of the 24" z3100? That would be my sole determining factor, assuming it's in mint condition as you describe. If it's cheap, I say snag it. You'll always have a backup printer as well, and except for the Red, I believe you can use the same ink carts in the z3100 and z3200. I own a 44" z3100 and 44" ipf8300, and while I don't exclusively use the z3100 for B&W, I definitely love the B&W output on the z3100, and do print all of my B&W work on it.