Hi all, I'm thinking about buying a MB Duet for my 22month old and 4 month old as the Phil and Teds doesnt seem to be working out for us. There are a few selling on ebay and gumtree, and they all seem to be roughly 3 months old. Is there a reason for this that Im oblivious to, I dont want to end up with another buggy that doesnt work so any advice would be grateful! thanks in advance.