Hey Sven,

I just spoke with a few shops earlier in July and they said the prices currently were

A plates (Inside Shanghai and you can carry a passenger) Approx 160K RMB
C Places (Inside Shanghai but NO Passenger) Approx 25K RMB

You can always check with the BMW or KTM shops near the HQ Terminal 2 as they are regularly checking with brokers to find available plates for the bikes they sell. I think they currently have 2-3 bikes in their shop that are actually waiting for A plates to come on the market so they can deliver the bikes.