I think I paid $220 for mine. Was the only one that Target Penrith had so I put it on layby. Then a few weeks after I got him out of layby, there were like 10 of him on the shelves :p I must have been lucky though because mine does not suffer from any of the QC complaints.
As for Grimlock, I would be tempted to buy one, even though I do have the TakTom version. But when you need every spare penny, I just can't justify buying another version of him. Maybe they will still have a few when I actually have money again.