Here's one on sale here in Seattle. It has less miles. But look at the price.
1988 *Porsche* *944* 'Celebration Edition'
My son has one, but sadly the original upholstery was pretty much toast. We put a linen interior in it; the only original part left are the door cards. Here's pictures of my son's:
http://www.69workshop.com/New_88/ It's currently primered waiting to get painted.
$6850 is a decent price for the car you're looking at - providing that it's all ok mechanically.