I'm an expat in China (Shanghai). My 986 2.5 '97 with 47,000km is worth RMB225,000 on the market (US$35,714.28). Had many offer already and I keep getting them regularly. Dealer trade it at RMB150,000 (US$23,809.52).
996 here are on average RMB400,000 (US$63,492.06). Low mileage and excellent condition = MORE!
Have a go at
【二手车_二手车交易市场_二手车交易网】 - 51汽车网 and type the Pcar model in the to search engine. You US/CA based dudes should not complain too much