I currently have one (1) calibrated Granatelli MAF Sensor for sale which I purchased from Performance Products for $339.95 + shipping (part #171386).
This part is still in the original box and has never been installed. It will fit 1999-2002 GM trucks (4.8/5.3/6.0/8.1 & 4.3 full size truck with cold air). Selling for $200.00 + shipping.