After several reports of armed holdups, police issued a warning this week for potential buyers to be cautious when meeting online sellers, the Chicago Tribune said.
One 23-year-old victim was shot in the thigh and groin at a meeting, police said. All of the victims were robbed of cash and their vehicles, police said.
With the help of U.S. marshals, police arrested 20-year-old Andrew Jones. He made first appearance in court Saturday to face multiple charges of aggravated assault and armed robbery, the newspaper said.
He remained in custody Sunday, unable to post $350,000 bail.