Npc shop sell you one item then if you buy the same thing its free and can keep doing itSolved

like say you have 40 scrap and you buy blue card for 40 it buys it right but then if you buy blue card again its free and can keep doing it  any ideas

Well, it would help if you could show me how you have set up your shops to start.
Technically speaking items were intended to be free if pricing was set as 0. Etc 

Or if possible could you please send me your config file in DMS on discord @Khan#8615 for debugging purposes. 

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