The manufacturing plant to build the new car was built in Dunmurry, Northern Ireland, with substantial financial incentives from the Northern Ireland Development Agency of around £100 million. Renault was contracted to build the factory, which employed over 2,000 workers at its peak production. The engine was made by Renault, while Lotus designed the chassis and bodywork details. The Dunmurry factory eventually turned out around 9,000 cars during 21 months of operation. In 1980, an American Express catalog featured an ad for a DeLorean plated in 24-karat gold. According to the ad, only 100 were going to be manufactured and sold for $85,000. In total, only 4 were actually purchased.