A barn-stored 1968 Shelby GT500KR spent thirty years out of sight before selling for $495,000 at Barrett-Jackson’s Scottsdale auction, beating out two rare Boss 429 Mustangs and a $396,000 Hemi Superbird. See what else made Barrett-Jackson’s own list of the sale’s ten best-selling muscle cars, and why documented originals are commanding record money in 2026.