Brisket, chicken, pork ribs & sausage at Fargo’s BBQ in Bryan, a favorite stop for the Posse. Frugal isn’t a word I’d use to describe the Posse. When we see something at a joint that looks good, we order it, whatever the price. But as we’ve journeyed the Texas BBQ trail the past couple weeks, I’ve been struck by brisket prices: $22 a pound at Franklin Barbecue, $24 at LeRoy and Lewis, the excellent new trailer joint in south Austin, $20 or so at several other places. Fargo’s BBQ co-owner Belender Wells shows their new barbecue sauce.(Photo ©Chris Wilkins/Texas BBQ…