I'd say prices have softened.
Dealers are expecting them to sell for less and there are certainly more cars coming onto the market (3.2, 964, 993, 996, 997) with cars hanging around.
Started earlier this year and we now have the Xmas dip, a first rise in rates, Brexit looming. It'll be interesting to see if it recovers in 2018 or more cars hit the market as 'investors' get itchy feet.
But only my opinion and I have a 996 turbo so no interest in talking up or down.