When Takara is able to develop some new MP molds for other G1 TF characters? There are heaps of them even after 3P made some of them first.
Cool story bro.
Don't buy them. As others have noted, selling redecos such as this, with minimal new tooling, helps offset the cost of other figures who require more tooling costs.
You don't need to buy. Others want to, and their purchases help fund new MP molds.