I actually bought one off Ebay a month ago. Waited for the last minute to bid on it. Paid $305 for it (my Boxster has Litronics but the driver side one had the lens melt - thanks to the local Porsche Dealer in town). My melted one is sitting at home as spare parts.
So if you do look for these on Ebay AND be patient, you can get both Litronic headlights for under $900 for sure.
CR