The new Corvette ZR1 is the top dog in its class, an affordable American supercar with 638 horsepower on tap, a carbon fiber body, and some of the most technologically advanced gizmos available on any automobile. But it isn’t the first Corvette to bear the ZR1 moniker. While that code skipped a generation with the C5, there was a very special, very expensive fourth-generation Corvette with an engine that remains unique to this day – the Lotus-designed, Mercury Marine-built overhead cam 32 valve LT5.

Up for sale on eBay is a one-of-two 1988 Corvette ZR-1 King of the Hill prototypes, and the asking price is just $200,000.

According to the ad, this concept vehicle was built before the ZR-1 moniker was attached, although the production vehicle that GM eventually built was based on this concept. Given the name EX5023, it was ordered crushed in 1990, and was discarded on a junk pile for years, until the seller came along, found out what this car was, and set about restoring it.

Though the roof needed fixing, apparently the frame was straight, so the seller set about properly restoring this special Corvette. It’s about 90% of the way done, though the LT5 engine has not been run, and it still requires brake and fuel lines to complete. Once done though, this will be a special piece of Corvette history, perfect for the die-hard collector.