For the Merchant Job Change Guide, see here.
Besides the Platinum Skill Quests, the Merchant class also can do a training quest, which gives them Base and Job EXP, a Battle Axe, and 10 Red Potions.
|Discount||Decreases the prices of items sold by NPC shops.||10||Passive|
|Enlarge Weight Limit||Increase Maximum Weight Limit.||10||Passive|
|Item Appraisal||Identify an unknown item, making it available for use.||1||Active|
|Mammonite||Inflict surprising damage to a target by spending an amount of zeny determined by the level of skill that is cast.||10||Offensive|
|Overcharge||Increases amount of zeny received for items sold to NPC shops.||10||Passive|
|Pushcart||Enables rental and use of Pushcarts which provide additional storage for items, although items cannot be directly used or equipped from a Pushcart. Pushcarts can be rented from Kafra Employees.||10||Passive|
|Vending||Open a street stall for selling items to other players. Skill level affects the number of items that can be vended at one time.||10||Supportive|
|Cart Revolution||A splashed damage attack in which a Pushcart is smashed into a target. Inflicts 150% of the damage of a normal attack in addition to extra damage from the weight of items in Pushcart.||Offensive||Cart Revolution Quest|
|Change Cart||Change Pushcart appearance. There are five different Pushcart styles that are chosen according to the character's Base Level.||Active||Change Cart Quest|
|Crazy Uproar||Scream with battle vigor to add +4 STR for 5 minutes.||Active||Crazy Uproar Quest|
|Buying Store||Open a simple store from which you can buy various items from others. Consumes 1 Bulk Buyer Shop License.||Active||Buying Store Quest|