The Austin Powers Funko Pop will likely soon be vaulted because distributors have stopped taking orders for this Pop. The current supply for this Pop is very low on Amazon but there is still a decent amount left on Ebay. With such a high sell-through rate on Ebay, it is only a matter of time for the Ebay supply to dry up as well.
There also is a GameStop exclusive variant of this Pop in a red suit. This variant could also rise in the future as long as there are no restocks from GameStop but that is always hard to predict. The common version looks like it will be vaulted but we won't know for sure until the Funko App is updated.
Of course, this is speculation and not investment advise. Let me know if you agree or disagree in the comments below and feel free to mention any Pops you think are set to pop in price as well!