I have not seen any used ones for sale but I found this dealer of Anschutz, Walther and Hammerli. They have quite a few new rifles on there.
It might be worth checking out if they have any leads.
http://targetshootingproducts.com/in...8f3b9add9762a8
Maybe D&L Airguns in Langley. They sell some higher end from time to time. They might know where to look for a used one.