I've read somewhere that in Beijing, 2 wheeled motorcycles and 3 wheeled (side car) bikes use different plates, as in you can't use one with on other. Can someone confirm this from personal experience?

Also, can someone post the lasted price they've seen or paid for a 京A plate. Please specify 2 or 3 wheeled plate (assuming there is in fact a difference).

In that vein, in May 2015 I saw a 70cc bike with a 京A plate the owner was asking 80,000 rmb for both.

Thanks so much
Ed