I spent ~$400 on a Deuter baby/toddler backpack two years ago and it still works. Beautiful thing.

We are the third owner of our Deuter baby/toddler backpack. We use it a fair a bit and it still looks like new. We don't need it anymore, so it's going on to a 4th owner who's going to get an amazing, comfortable, near-new carrier for the same token $20 bucks we paid.