A Merchant is a person selling weapons and other items in Deus Ex: Human Revolution. Detroit - City Hub: * Grayson (Abandoned gas station) * Seurat (Earl's Court apartment - climb the ladder across from the basketball court) * Vera Marcovic (LIMB clinic, buy only) * Andrea Mantegna (LIMB clinic, buy only) Detroit - Highland Park * MCB Gang Leader (Near the starting point, buy only) Hengsha - City Hub Hengsha - Belltower dock * Lu Pin Rong (Near the starting point in the sewers) Panchaea * Gerta Mueller (LIMB clinic, buy only)