As "ImSleepy" from IRC mentioned the name "Agora" seems to be a fitting name for the decentralized marketplace.
Relevant Wikipedia:
https://en.wikipedia.org/wiki/AgoraThe Agora (/ˈćɡərə/; Ancient Greek: Ἀγορά Agorá) was a central spot in ancient Greek city-states. The literal meaning of the word is "gathering place" or "assembly".
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the agora also served as a marketplace where merchants kept stalls or shops to sell their goods amid colonnades.