( CNN ) For expert car restorers at General Motors , a wrecked , supervaluable 1992 Corvette represents a tall mountain to climb . Of the three repairable Corvettes that fell down a sinkhole at Kentucky 's National Corvette Museum in February , the 1 millionth Corvette -- a white convertible -- will be the hardest to bring back to its former glory . Of the eight cars swallowed by the hole , only three have been deemed salvageable . On Wednesday , General Motors and Chevrolet showed it off to the media at a special facility in Warren , Michigan , before restorers begin what 's expected to be a long restoration process . The sweet machine is pretty banged-up . Chevy says it 's the most valuable of the three cars . Car and Driver lists its worth at $ 750,000 or more . At age 22 , the car is old enough that it will be hard to find or create replacement parts . Plus , restorers will be forced to try to salvage as much of the original components as possible to preserve the history of the car . Experts call the Corvette the most collected car in America . GM says it 's the `` world 's longest-running , continuously produced passenger car . '' Recently , restoration on the first of the three salvageable cars -- a 2009 ZR1 Blue Devil -- was completed . The museum said last month that the third fixable vehicle , a 1962 black Corvette , is just too old for GM to handle . The company said it no longer has the institutional knowledge required to properly put it back in shape . That job is expected to be done by a hand-picked restoration specialist team , the museum said . Five of the eight damaged cars were deemed too beat-up to be restored : . • A 1984 PPG pace car . • A 1993 ruby red `` 40th anniversary Corvette '' • A 2001 Mallett Hammer Z06 Corvette . • The 2009 white `` 1.5 millionth Corvette '' • A 1993 ZR-1 Spyder . As for the 1 millionth Corvette , it 's expected to be back as close to mint condition as possible by June . We 'll keep an eye on it and let you know how it turns out .
Of three fixable , priceless Corvettes wrecked , the most valuable is set for restoration . Eight cars were swallowed by a sinkhole that appeared inside National Corvette Museum . The 1 millionth Corvette , a 1992 white convertible , will be the most difficult to restore . Restoration at a General Motors facility in Michigan is expected to be complete by June .