When will surface pro 3 or 4 with windows 10 go on sale?

[Windows Central Question]

I love the tablet but cannot stand windows 8.1 so I returned it knowing that win 10 will be out at the end of June. When will the Surface pro go on sale after that?

 

[jefbeard911]

If your bold, you can do it now..

Microsoft Surface | Windows 10 Insider Preview | Install Windows 10 Tech Preview

The official release may come out 29 July OR later (Sept/Oct 2015 when the phone version is released)