ShopGUI+
Versions: 1.8
Official website: https://www.spigotmc.org/resources/shopgui.6515/
Shop command aliases: /shop /shopgui /guishop
/shop - open the main shop menu (shopguiplus.shop)
/shop reload - reload the configuration (shopguiplus.reload)
/shop [shop name] - directly open the specified shop (shopguiplus.shop)
/shop [player] [shop name] - open the specified shop (or main one if none specificed) for specified player (shopguiplus.others)
Price modifier commands
/shop addmodifier item <player> <shop> <item> <value> [buy|sell] (shopguiplus.shop.addmodifier) - add item-specific price modifier
/shop addmodifier shop <player> <shop> <value> [buy|sell] (shopguiplus.shop.addmodifier) - add shop-specific price modifier
/shop addmodifier global <player> <value> [buy|sell] (shopguiplus.shop.addmodifier) - add global price modifier
/shop resetmodifier item <player> <shop> <item> [buy|sell] (shopguiplus.shop.resetmodifier) - reset player's item-specific price modifier
/shop resetmodifier shop <player> <shop> [buy|sell] (shopguiplus.shop.resetmodifier) - reset player's shop-specific price modifier
/shop resetmodifier global <player> <value> [buy|sell] (shopguiplus.shop.resetmodifier) - reset player's global price modifier
/shop checkmodifiers <player> (shopguiplus.shop.checkmodifiers) - check player's current price modifiers