Convert planned weekly boss clears into meso through the GMS crystal sale system.
Global MapleStory (GMS), PC
WHERE & HOW TO FARM
Where to farm
Defeat eligible bosses, collect their Intense Power Crystals, then sell them to the Collector NPC.
Weekly bosses produce Intense Power Crystals that can be sold to the Collector for meso. In GMS, each character is limited to selling 14 weekly crystals, and a world has a 180 crystal weekly sale limit. This makes a boss list a resource allocation problem: choose encounters the character can clear and sell the crystals before spending the weekly quota on lower-value options. Crystal values change, so use current in-game pricing rather than relying on old figures.
Access to boss encounters and their weekly reward claims
Available weekly crystal sale quota on the character and world
Review the current boss list and choose eligible encounters you can clear reliably.
Defeat each planned boss and collect its Intense Power Crystal reward.
Check the crystal descriptions and current sale values in inventory.
Before selling, consider the remaining 14-crystal character quota and the world’s shared 180-crystal limit.
Visit the Collector and sell the crystals you selected for this week.
Track the remaining quota so later planned boss clears still fit the world cap.
Farming tips
Crystal values are patch-sensitive; inspect current item sale values rather than using remembered meso totals.
Reserve quota for the bosses that best fit your weekly income plan.
Repeat, collect and use
Repeat with weekly boss clears and sales, subject to 14 crystals per character and 180 per world each week. The sale quota is limited and resets on the game’s weekly schedule.
Common mistakes
Selling every available crystal without considering the world cap; check both character and world quota first.
Using outdated price tables; read the current crystal value in the client.
Assuming boss rewards can be sold without collecting them; claim and retain the crystals before visiting the Collector.
When to stop or switch
Stop selling after reaching your chosen quota or the applicable cap. Resume after the weekly limit refreshes and reassess the current boss values.