Check known areas methodically
The supplied video material identifies merchant spawn locations, but locations can change with an update. Sweep accessible areas in a consistent order and verify the current NPC or prompt.
Bring the right currency
Before buying, read the merchant’s current listing and make sure you are spending the required resource rather than a currency needed for progression.
Document live spawns
When you find the Merchant, save the area, update number, item list, and time. This produces a useful current reference without copying another site’s layout or branding.