These have been relatively hard to findin the U.S. until recently. The supply was there and suddenly dried up. I wish SG would get more DDR stuff. Apparently they DO have a source they're drawing on independent of Sturm and Marspec, and this source has things in quantity. It just depends on what their buyer runs into and decides what to get. I sort of wish I'd gotten a few more now. Just waiting to see if they get anything new in for Christmas. Has anyone gotten a recent Surplus catalog???