They are many shops across the map that will sell different goods that can either be weapons, armor, or just cosmetics
Weapon Shops and Yen Shop[]
Yen Shop[]
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The yen shop primarily sells weapons but will also sells other usefull items such as the training weights or spins, the first set of armor can also be bought there
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Rare Weapons Shops[]
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Mythical Weapons Shops[]
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The most expensive weapons by far and the strongest one aswell, this shops sells the best weapons in the game, the weapons this shop sells also need high level requirements compared to the other shops were the weapons needs no level req
Armors Shops[]
Aburt's Abandoned Shack[]
This shop sells the Golden Armor set, yeah, that's all there is... nothing else