Original sentence: Although by Porsche standards many were built, by 2010 the number of surviving 944s (in any condition) is falling to around 40% due to the high maintenance costs of the now old and higher mileage cars scaring off potential buyers.Competitive racing events are held by the National Auto Sport Association and other organizations, as well as compatible rules that allow the same cars to race with the Sports Car Club of America, Porsche Club of America, and Porsche Owner's Club.The post-1985 cars (referred to as the 85 and 1/2's), Turbos and S variants are considered more desirable than the earlier cars; having improved interiors, suspensions, and engines
Edited sentence: A well cared for, and low mileage example will be an even rarer find, and will bring a high dollar.Although by Porsche standards many were built, by 2010 the number of surviving (in any condition) 944's is falling to around 40% due to the high maintenance costs of the now old and higher mileage cars scaring off potential buyers.Both enjoy strong competition in racing events held by the National Auto Sport Association and other organizations, as well as compatible rules that allow the same cars to race with the Sports Car Club of America, Porsche Club of America, and Porsche Owner's Club.The post 1985 cars (referred to as the 85 and 1/2's), Turbo's and S variants are considered more desirable than the earlier cars; having improved interiors, suspensions, and engines