Based on this report of what the USPS is asking to replace an ages-old design mail truck [1] ($30k per), EUR 25k sounds pretty dang good for a purpose built small-run pure-electric vehicle. I'd bet they could easily get the costs down to 15K EUR with appropriate volumes.
Maintenance costs on electric vehicles are a lot less, and obviously they don't use fuel, so that costs less too.
[1] http://voices.washingtonpost.com/federal-eye/2010/06/broken_...