Answer:
In the novel "The Great Gatsby" by F. Scott Fitzgerald, Tom Buchanan's purpose of "selling" a car to George was to cover up his own involvement in the death of Myrtle Wilson, who was hit by Gatsby's car. Tom knew that George was angry and looking for the owner of the car that killed his wife, and he was afraid that he might be accused of the crime. So, he used the opportunity to convince George that Gatsby was the one who owned the car and was responsible for Myrtle's death. By "selling" the car to George, Tom was able to shift the blame onto Gatsby and protect himself.