For sale: Snow’s BBQ original catering smoker and trailer. (Photo ©Chris Wilkins/Texas BBQ Posse) Want to buy a serious piece of Texas barbecue history? Snow’s BBQ owner Kerry Bexley has a deal for you. One of the fringe benefits of having breakfast at Snow’s on a Saturday morning is talking barbecue with Kerry. From our first visit in Nov. 2009, he’s treated us like family as we’ve caught up on all the Central Texas BBQ gossip. During our trip a week ago he casually mentioned that his original catering rig was for sale, priced at $2750 or best offer. Several…