US authorities said a woman offered a two-year-old relative for sale on eBay and accepted a man's tongue-in-cheek bid.
The Holland Sentinel said police located the woman in Allendale Township, about 15 miles west of Grand Rapids, Michigan.
The woman had been caring for the child. The girl is now in her mother's custody.
Nineteen-year-old Autumn Braden told The Grand Rapids Press she did it to "see how eBay worked" and it "wasn't meant to be taken seriously".
Ottawa County sheriff's Lieutenant Mark Bennett said police received calls about the internet posting from as far away as California.
Lt Bennett said one bidder who thought it was a hoax called police when the bid was accepted and helped lead them to the woman.