Each car pays $20,000 upon delivery, but the 10th and final car on the list pays $120,000, bringing the total payment up to $300,000 each day if you find all 10 vehicles. While the names of the cars are given to you, the game doesn’t tell you where to find them.
The Exotic Exports List is a new feature added to GTA Online in the Los Santos Tuners update, and it provides you with a list of rare and expensive cars that can be collected in exchange for cash and RP.