I have a Zebra cover that the elastic is not so good on anymore. Should I sell it and leave it up to the next person to replace the elastic or should I replace the elastic and then sell it? I have two MA but really only need one. I plan on moving my 7yr old into a highback booster soon and then the 5yr into the Radian. Which leaves the 2.5yr old ERF in the other MA. So should I sell the MA with the Zebra cover or seperate with another cover?