I have a Cybex Sirona m2 that is only 18 months old that is no longer used, it was bought brand new . However, I have looked at the manufacturing date underneath which says it was made in the middle of 2016 although it was purchased near the end of 2017. I am planning another child in the next 2-3 years, would it be safe to store and reuse it? It seems such a waste to throw it away as it was so expensive! The only info online says you can only keep them for six years and which technically mean I probably couldn't reuse it.