A potential buyer (if on e exists - I am nervous) would value pona at what it is bringing in today, with some probability factor for non-US income.
But my opinion is that a potential buyer would only be buying the pipeline and the discovery team, and that pona - in any market - is just a nice plus on top of that.
Who? Well, CELG has been mentioned here before and they appear to be aggressive (and good!) at picking up platforms and pipelines. (And if they can get thalidomide back on the market, then their reg affairs folks should find a few blood clots easy to address!)
Just my completely uninformed opinion......