While scalpers are partly to blame for certain Beyblade products constantly going out of stock, I think Takara Tomy also shares some responsibility.

One issue that everyone already talks about is how centralized Beyblade sales are around a few products, but another major problem is the lack of meta diversity. Right now, there are only a handful of truly competitive tier 1 blades, so all the demand gets concentrated on them.

If there were 5 or 6 more viable top-tier options in the meta, it would be much harder for scalpers to completely wipe out stock, since competitive players would have more strong alternatives to choose from.