The first deck I produced for my start-up Cypsel in 2013, when we began to recruit beta testers...

9. Liquidity: the critical mass that provides enough
volume of supply and demand for transactions to
take place.
Matching efficiency: how easy it is for buyers and
sellers to meet up and begin trading.
Quality of participants: how can participants know
that they are dealing with honest and trustworthy
people.
Based on the article by S.P. Choudary http://platformed.info/online-marketplace-metrics/

10. Percentage of listings that lead to transactions:
measures the liquidity of the market.
Percentage of searches that lead to profile visits:
measures the matching efficiency of the market
and shows how well curated is the service.
Percentage of recommendations per number of
transactions: measures the quality of the
participants in the market and shows how well
curated they are.
Based on the article by S.P. Choudary http://platformed.info/online-marketplace-metrics/

18. facebook.com/Cypsel
Slideshare.net/Cypsel
twitter.com/CypselUK
Cypsel.wordpress.com

20. www.cypsel.com