Boxsters are a challenge to sell because potential buyers get scared off by the Internet drama.Jags have the same problem.Perhaps diesel VW/Audi/Porsche also? Asking prices are misleading.Actual selling prices are more useful than a sellers "I've 'invested' a fortune in this car and now I want my money back!" asking price.
An interesting source of actual sales price data is EBay "Completed Listings" - if you check the sold section.
porsche Boxster S | eBay