In GemstoneRO, several NPCs are available to help you purchase items related to 3rd job classes such as Guillotine Cross, Rune Knight, and Sorcerer. Follow the instructions below to locate and interact with these merchants.

Poison Herb Merchants can be found in several locations, selling various poison herbs useful for Guillotine Cross. To use them, follow these steps:

1. Approach the NPC named Poison Herb Merchant.
2. The NPC will ask, “Do you need poison?”
3. Select the herbs you want to buy from the shop list.
4. Purchase your desired items using Zeny.

Locations:

• Guillotine Cross Map: (job3_guil01 79, 96)
• Morocc: (morocc 193, 100)
• Lighthalzen Inn: (lhz_in02 16, 205)

Rune Stone Merchants sell rune stones needed for Rune Knights. To interact with them:

1. Approach the Rune Merchant.
2. The NPC will mention the different types of runes available.
3. Browse the shop and buy the necessary rune stones.

Locations:

• Rune Knight Map: (job3_rune01 90, 62)
• Prontera: (prontera 168, 228)

The Rare Herb Collector allows you to exchange specific rare items for poison herbs. If you meet the requirements:

1. Talk to the Rare Herb Collector.
2. The NPC will check if you have the required items and weight capacity.
3. Select how many herbs you wish to exchange.
4. Complete the exchange for poison herbs like Izidor.

Location:

• Guillotine Cross Map: (job3_guil01 91, 93)

Point Merchants offer element shards needed by Sorcerers. Here’s how to use them:

1. Talk to the Point Merchant.
2. The NPC will ask, “Do you have an element for each property?”
3. Access the shop to buy element shards.

Locations:

• Geffen Tower: (gef_tower 105, 172)
• Prontera Inn: (prt_in 131, 66)
• Alberta: (alberta 105, 52)
• Aldebaran: (aldebaran 133, 114)
• Comodo: (comodo 193, 159)
• Geffen: (geffen 129, 49)
• Izlude: (izlude 138, 163)
• Izlude Alternate A: (izlude_a 138, 163)
• Izlude Alternate B: (izlude_b 138, 163)
• Izlude Alternate C: (izlude_c 138, 163)
• Izlude Alternate D: (izlude_d 138, 163)
• Malangdo: (malangdo 214, 163)
• Mora: (mora 115, 118)
• Rachel: (ra_in01 256, 273)
• Veins: (veins 202, 128)
• Dicastes: (dicastes01 207, 200)
• Manuk: (manuk 261, 206)
• Splendide: (splendide 207, 160)
• Midgard Camp: (mid_camp 224, 237)

These merchants provide essential items to progress through your 3rd job journey in GemstoneRO. Make sure to gather enough Zeny and the required items before interacting with these NPCs. Happy gaming!