Accurate shutter actuations on D80

I'm selling my D80 in the next few weeks, and need an accurate shutter count. I've tried EXIFViewer, but it quotes me 2441 shutter actuations: that's probably how many i've taken in the last year or so. I've had the camera for 3 years, and im sure I've got well over 15k actuations, if not 20k-25k.

Is there any way of getting a more accurate count?