You may not have to buy everything new for your baby, but 11 years is too long (my opinion). I had a crib and mattress, when I threw them away they were 5 years old and used by a friend's baby and my elder daughter, I thought it would be too old for another baby though it was still in a good condition. I prepared a new one for my baby. Comparing the new one and my 5 year old one, I could tell the difference, let alone the 11 years old. Just for your reference.