The shop owner i trust as i have been dealing with him for a few years with my previous dog and also my budgies. He was also closing down and wanted an opportunity to sell Beau so he wasnt surrended.
Take it as you will, but as i said, the shop owner i do trust.
Oh, and FWIW....We did go to the RSPCA first, but having 3 small kids there was nothing there i was comfortable bringing home to my children. As sad as that sounds.