How do I get a Perfect Bonus Potential Stamp?

[piratebae19]

Im a noob and I realized that have a perfect Stamp in my inventory, not sure how I got it and I know it costs alot.
How do i get another one? Was it from a quest?

 

[Net]

The most common way to get a Perfect Bonus Potential Stamp is from leveling a new character to 190.
They typically sell for around 1.9-2.1b mesos. You can check in the auction house if you'd like to refer the prices of current stamps on sale.

Also from the FAQ by Spyro:

Bonus Potential Stamps can be purchased from the PQ Shop located at the Party Quest Entrance.