Being the owner of one of those orange Boxster Ss, I figure the current premium is at most $4K over std price but most of that is the fact that they came with a lot of options. The other variable is which # of the 250 you have.
I doubt the seller will get his price. $44 gir is way over the price of a normal 08S and #228 isn't that big of a deal. I guess the old adage of 'you can always ask' comes into play here.
If he does get that price, I'll have to seriously consider selling my #005.