I agree that some dealers don't know how to do business with an up-front, honest, serious buyer. Maybe you should finance through your own credit union? Don't use the stealership's financing. Good luck.
As far as the shifter: that's

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2003 Z06 - Tint | C6 Z06 Shifter w/Knob | GHL 2-Tip Magnums | Z06 Exhaust Plate | Hood Seal | Zip-Tie Intake | 1-4 Shift Defeat | NGK TR 55s | Nitto 555 RIIs.
My BPP Shifter Broke In Two!!
Bad Slave Cylinder = New Clutch