I have a Torker Cargo-T. I got it new for less than $500. It's a copy of the Batavus Personal Delivery, one of those $1300 bikes you were talking about. The difference is that the Dutch bikes are made to sit outside in the weather (like cars in the USA). They have treated frames, fully enclosed chains and all of the shiny bits are rust resistant. The Torker is fine, but wouldn't last as long if left outside.
There's a website that specializes in Utility and Transportation bikes available in the US and Canada:
http://www.bikesfortherestofus.com/