Based on this recently completed Ebay transaction for a comparable car missing parts, and the fact the owner claims this car to be virtually complete, the price has been set at $15,000.00 OBO.....
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=250096008009&ssPageName=ADME:B:EF:US:2