As 998S noted, in recent months there has been a growing gap between the price of a car plate at auction and a bike plate in the secondary market, and this will continue to be the case. It sounds as if you don't much give a shit about the growing scarcity and how it affects other riders, but I hope others will do their best to keep bike plates on bikes.

In the case of Fred's old YBR250, now in Tuna's hands, the best approach would be to delink the Hu A plate from the YBR, sell the YBR outside of Shanghai -- and we already have a candidate buyer in Weifang -- and then apply the Hu A plate to a new bike. This way Tuna has a legally plated bike that he wants, and continues to hold the Hu A plate, which is a buoyant asset. And Tuna does his bit to keep the pool of Hu A plates from shrinking.

cheers!