Experienced moms love to tell expecting ones what to, well, expect. And besides handing down advice, they often like to hand down baby gear. It might be emotionally satisfying to put your baby to sleep in the same crib you first slept in or one recently used by a friend, but that might not be what's best for your baby. Sandra Gordon, of Weston, Conn., writes on a wide range of parenting topics, including baby safety, and is the author of "Consumer Reports Best Baby Products" and "Save a Bundle: 50+ Ways to Save Big on Baby Gear." She shares some advice on when something new is best for your baby and what to look for if you are considering gear that was previously owned.