Versa

Location
is the Mystery Merchant you will find in various locations around Veritas District
 * Bastion
 * Camp Sunlight
 * Seren's Garden Fishery
 * Seren's Garden near Melricas Passage
 * Camp Sagacity
 * North part of Upper Archive, where first part of Guardian Legion mission "Escape from Balder's Refuge" with 3 orcans takes place
 * Camp Curiosity
 * Stronghold Camp next to Archive Stronghold (MM discord)
 * Brightleaf Glade (west corner next to lake and waterfalls)

Mystery Merchant Shop
's shop information can be found in this list here

Trivia
The only difference in the all of Arborea's Goblin merchants in the color of their backpack.