The Lamp (2010) on Netflix

Plot summary

Two years have passed since Stanley and Lisa Walters lost their son Eddy, and Stanley now sleeps in the boy's room, keeping his distance from Lisa and from everyone else. When she collects Eddy's things for a fundraising sale, Stanley accuses her of selling his son's memories. At that sale their neighbor Miss Esther, who cares for foster children, offers an old oil lamp, saying it had given her what she needed and should now pass to a new owner. Nobody buys it, and when Lisa tries to hand it back, Miss Esther tells her it was waiting for the right owner. A stranger, Charles Montgomery III, then arrives at the house and offers the couple three wishes.