Nearly two dozen muscle cars, from a 442 W-30 convertible to a numbers-matching Cuda 440 Six Barrel, failed to sell at the Mecum Indy May 2026 auction — and one no-sale has nothing to do with price. A Boss 429 crossed the block repainted black over its original Grabber Blue, and viewers aren’t forgiving it. Watch to see the full list of cars that didn’t find a buyer, and why.