I'll tell what I know, it might be old news, but. yes, Shannon is selling the Kenowrth and he owns a SATB trailer also. His trailer is different from the one in the pictures. I believe they are both for sale.
The SATB trailer used on the Bandit Run 2009 is not for sale. Also Prissy Reed did sign the driver's door of the Kenworth.
I hope that clears up any confusion.