How do I get Master's Training Manual in GW2?

Check the Acquisition and "Sold by" sections, which list the vendors, containers, salvage sources and achievements that grant Master's Training Manual, where known.

What is the Trading Post price of Master's Training Manual?

The live buy and sell prices are shown at the top of the page, pulled from the official Guild Wars 2 Trading Post API.

Masterwork · Default · Level 40

Master's Training Manual

Double-click to use. This item will unlock the ability to spend up to 20 points in all trait lines, and will refund your currently spent trait points. This item can only be used once.

Vendor 12