I would hate to pay $7+ for a little PK Droid. It would make more sence to make it a pack-in with Tey How or some other Neimoidian IMO. Aren't these PK Droids smaller than the Pit Droid? I thought they were only about knee high as the Pit Droids are about waist high. I could be wrong.
Yeah, PK droids are TINY. They'd make a great packin even if not articulated. Though I'd like at least 5 POA with them at least (shoulders, legs, head)
In comparison, Pit Droids are 1.19M tall
While PK droids are smaller (I don't have an exact height on them). http://www.starwars.com/databank/droid/pk4/index.html
Compare the pics in the link for each doird and it's obvious the PK droid is smaller.
Likely we won't see these two or three to a card either, so as a pack-in to a regular figure, they'd do nicely.