Nevertheless here's where I think we disagree:
* Inventory will have some liquidation value. Let's discount inventory by 75% which is pretty conservative; you will still get $200M here
* IP - Main disagreement for me is here. Most analysts who have pegged the IP at $2 - $3 bn. Let's put it at $2bn, the lower end of the spectrum [1][2]
6.2 + 2.2 - 3.7 + 2 = $6.7B (~40% above purchase price)
As we can see the main question is the value of the IP (and PPE to a lesser extent). I have absolutely no experience valuing patents, I'm not a patent lawyer, and definitely won't be evaluating their 9K+ patent applications. So unfortunately there's a pretty big unknown in the valuation.
Regardless we have a $4.7B - $6.7B range based on a very quick 15 minute analysis of their balance sheet with an upside of earnings of any profitable lines of business that can be operated independently (if they exist).
My guess is tha Prem Watsa, as former chairman of BBRY, has done a much more rigorous evaluation of their IP and found profitable business lines he wants to keep / spin-off to reach a comfortable margin of safety.
[1] http://money.cnn.com/2013/09/24/technology/enterprise/blackb...
[2] http://blogs.wsj.com/corporate-intelligence/2013/08/26/the-n...