The 19th annual antiques show and sale is Saturday and Sunday in the ballroom of the Carson Valley Inn.More than two dozen vendors will feature items such as art from western to Native American, glassware and crystal, railroadiana and porcelain signs, sun purpled glass, furniture, folk art and primitives, estate jewelry, and guns and knives."The selection is always so good, so that's why I think this sale is always so popular," said organizer Martha Williams. "People can come and expect to find a little bit of everything."The appraisal clinic will feature backup appraiser for the Antiques Roadshow Tom Bartels who …