- commoditymarket_register_closed.ogg - from https://freesound.org/people/bspiller5/sounds/180252/ by bspiller5 under the CC-BY 3.0 license
- commoditymarket_register_opened.ogg - from https://freesound.org/people/kiddpark/sounds/201159/ by kiddpark under the CC-BY 3.0 license
- commoditymarket_error.ogg - from https://freesound.org/people/LorenzoTheGreat/sounds/417794/ by LorenzoTheGreat under the CC-BY-SA 3.0 license
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