Open Markets

EBay is an example, though a poor one on account of the sniping, and the fact that competing offers are easily mis-categorized.

Stock exchanges are another example, though they have suffered a complete TragedyOfTheCommons due to the disinformation campaigns of CorporateCommunists.

Is there any software handy that would help OpenCapitalists set up such a beast for themselves? And how are OpenMarkets to prevent their own TragedyOfTheCommons?

Maybe Vivisimo and EveryAuction might be useful here?

Vivísimo: Brilliant non-open text-clustering software. Great when used as a front end to search engines of your choice. http://vivisimo.com/

EveryAuction: from EverySoft. http://www.everysoft.com/auction/