Definitely go for good used condition if you can as everyone and their brother has had one of these so they are easy to find in excellent used condition. (twiniversity.com)
If the picture shows the diaper to be in good used condition (or better), then you will want to read the description of the diaper. (the-cloth-diaper-connection.com)
Diapers must be gently used and in very good used condition: (gobabygoshop.com)