Production numbers for both continued to be modest, with the Super Estate manufacturing 2,480 in comparison to 114,745 Super Riviera Sedan, with a listed retail price of US$2,480 ($ in dollars ) while the Roadmaster Estate and Roadmaster Deluxe Estate had a combined production of 420 and a listed retail price of US$3,433 ($ in dollars ) making the Deluxe Estate the most expensive Buick for that year. Production numbers of the Estate had remained small since it was introduced, and Buick changed the platform used a few times in an attempt to stimulate sales, and in 1955 the Estate had its most popular year with a combined total of 7,195, with the breakdown of 2,952 Special Estate with the last year of the Fireball Straight-eight engine at a listed retail price of US$2,974 ($ in dollars ) and 4,243 for the Century Special and US$3,175 ($ in dollars ), installing the all-new Fireball V8. "Cordaveen" upholstery began to be installed in various configurations beginning in the mid-1950s with cloth inserts on higher trim packages. Later during the 50s, the fashionable hardtop body style was introduced on the Century Caballero Estate Wagons that were offered only in 1957 and 1958 and was shared with the Oldsmobile 88 Fiesta hardtop station wagon. The hardtop feature was also offered on the Special Riviera Estate Wagon and sold 6,817 with a listed retail price of US$3,167 ($ in dollars ), while the Century Caballero Estate Wagon sold 10,186 with a listed retail price of US$3,706 ($ in dollars ), leading in sales against the Chrysler New Yorker Town & Country and Mercury Colony Park. 1960s In 1959 the LeSabre Estate was introduced on the B platform. Beginning in 1959 the intermediate Invicta Estate was offered with a listed retail price of US$3,841 ($ in dollars ) while the junior LeSabre station wagon was listed at US$3,320 ($ in dollars ). The Estate station wagons received a "Cordaveen" vinyl interior as standard, with the Saran Balfour cloth/Cordaveen combination interior available as an option in several colors. Engines were unchanged from previous years including the standard 250-horsepower 364-cubic-inch V8, no-cost regular fuel 235-horsepower 364 or the four-barrel 300-horsepower option of same engine available at extra cost. The two-speed Turbine Drive Dynaflow automatic transmission was standard equipment on LeSabres and all other full-sized Buicks this year, although a manual transmission was also available. The three Ventiports