I did flip last time, since the PPS rise was mainly due to few of the Seeking Alpha Article and nothing substantial from Takeda.
Next PPS rise will not occur on the basis of SA article rather it is a genuine news flowing from Takeda. If you snooze you loose a golden opportunity.
Right now it should be locked and loaded, not to look for $1 or more, rather I would expect btw $10-$12 with the re-introduction, unless there is a lowball buyout, where you don't have a control over it.
When it is re-introduced, the Product is coming back with a vengence and it will grab most of the Dialysis market, you are looking at 1.5 - 2 BLN market per year, which is 200-300 MLN $ royalty payout for AFFY.