BuickRegalTourX01.JPG Published on November 29, 2017 in Top-of-the-line 2018 Buick Regal TourX costs $43,795Full resolution (800 × 450) The 2018 Buick Regal Tour X Wednesday, July 19, 2017 in Milford, Michigan. (Photo by Jeffrey Sauger for Buick)