Authorities have launched an investigation into possible child trafficking against the baby's mother and 24-year-old father, neither of whom was identified.
"Offering my nearly new baby for sale, as it has gotten too loud. It is a male baby, nearly 28 inches (70 cm) long and can be used either in a baby carrier or a stroller," police quoted the ad as reading.
No offers were made for the child in the two hours and 30 minutes the ad was posted on Tuesday. EBay later deleted the posting, but assisted police in tracking down the parents.
Several people who saw the ad alerted police.