The U Factory uArm can be pre-ordered here:
http://store.ufactory.cc/complete-assembled-acrylic-kit/
The Lite Arm (a compatible 3D printed iteration) will be available on first come first serve basis on eBay. My seller acct. is "armatecgroup" the production schedule is as follows:
I'm printing another Arm now, but that will be sold as a kit, once that one goes I can produce a complete model for sale. I have a complete arm now but I need it for software testing and development. Price will be in the same ball park as the uArm (upper $200 range) until I can order parts wholesale. The kits I make are only $50 with shipping. The designs are open source so I expect others will also start coming up for sale online as well.