Few ideas of new sell/buy options
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1. Buy items with gold:
Offer: 1337g
Demand: Straw Hat
2. Gold+items buy offer:
Offer: 1337g, Shirt
Demand: Straw Hat
3. Sell multiple items:
Offer: Staw Hat, Shirt, Leather Gloves
Demand: 1337g
Conclusion:
4. General idea
Offer: items and/or gold
Demand: items and/or gold