Cribs passed down from your grandma or purchased at the flea market sound cool, but are most likely unsafe.
Ozzard says, "Babies put everything in their mouths. You don’t know where it’s been, what it’s painted with, how sturdy it is, how well the hardware holds. The CPSC recommends not using any crib more than ten years old, for these reasons. Use that groovy vintage crib somewhere else in your nursery, and stick with a CPSC- approved model for everyday."
If you plan on borrowing a used crib, make sure to see if it has been recalled first. For frequently updated safety information, visit the American Academy of Pediatrics.