Second hand

I found these overview site about second hand sailplanes.

Glider For Sale.org

Visit this overview page at http://www.gliderforsale.org

Glider Pilot Network adverts

Visit this overview page at http://adverts.gliderpilot.net

German site: Segelflug.de

Visit this overview page at http://www.segelflug.de/osclass/

If you know any other sites about second hand sailplanes, please, guide me towards them. But ...make sure they are in English, French, German or Dutch. I don't want to add political, pornographic, religious, sales or what ever non-aviation site to this list.