It should be at least above 60/70 satoshies according to the mining difficulty. If you consider also the activity in the community, the scope of the project which is ambitious and the project management, being at least in 200 satoshis is perfectly feasible (less than 3millions marketcap). As soon as it gets listed in another exchange 2000 satoshies should be reachable (less than 30 millions marketcap). It sounds ambitious but it´s the guideline that I will use to sell.