The IP owner is the one who would lead any investigation or legal stuff I think - they have a lot more to lose in terms of copyright if they didn't attempt to pursue unauthorized release of their IP.
In this case it isn't the typical bootlegging as what was being sold is fully packaged. For most bootlegged figures it seems clear that someone turned on the factory line for a bit extra outside the order (either seeing it was an aftermarket hit and getting the molds out or simply overproduced from the get go until they ran out of the raw materials/paints being used) - and selling that figure loose (rarely full packaging). As long as that represents a fraction of legal production and it is done after the main product has been in stores for awhile, I suspect the companies turn a bit of a blind eye if 100 or so figures make it to eBay this way.
In this case it isn't the typical bootlegging as what was being sold is fully packaged. For most bootlegged figures it seems clear that someone turned on the factory line for a bit extra outside the order (either seeing it was an aftermarket hit and getting the molds out or simply overproduced from the get go until they ran out of the raw materials/paints being used) - and selling that figure loose (rarely full packaging). As long as that represents a fraction of legal production and it is done after the main product has been in stores for awhile, I suspect the companies turn a bit of a blind eye if 100 or so figures make it to eBay this way.