I don't about allowing the reselling of individual licenses from the multiple license package, That would create a scenario where people could compete with Boonex as far as selling licenses goes. I don't think people wanting to cash out on their license is a common enough occurrence to do anything too elaborate. Why not just allow people top transfer a license to a new different account, and charge them a transfer fee to do it.,,, enough of a transfer fee to make it worth your while.
Below is the legacy version of the Boonex site, maintained for Dolphin.Pro 7.x support.
The new Dolphin solution is powered by UNA Community Management System.