I wonder how expensive.. KBB says a completely loaded 1997, in excellent condition has a value of 21,450.. not to mention the premium for being made in Germany!
Not sure of your price, but 1) its winter in most of the US and 2) it is an 11 year old sports car... in a market where HELOCs are dead and folks struggling with wanting a car requiring premium fuel. 3) There are over 100 Boxsters on EBay alone, let alone the other hundreds on other advertising venues.
In my research when buying my Boxster, it was said the Finland built cars (Valmet) were built as good OR BETTER than their german counterparts.
Regardless... Good luck on your sale. May you find a buyer quickly at a price that can be agreed upon. Replacing it with another neat toy?