For me it's faster to use a knife, a knife and a straight edge if necessary, or a knife and a T-square if needed. I have a 24" and a 48" drywall T-square. That's just me, your mileage may vary.
I'd take $150.00 for it. Just so you know, it's not a KleenCut, It's a 60"+ Keencut Practik, sorry...