Any decent marketplace for one-app or brand companies needs to prominently display
intedependently-verifiable, evidence-based due-diligence metrics than can be dug into by your legal and forensic/tax accountant folks
before a transaction. Saves lots of time. BTW: on apps, it is usually more profitable to
license source code to games and similarly common apps (say for gyms, restaurants, etc.). If it's a FNAC app that you're bored of
try to sell it, first, don't just throw out your work (or at least salvage the best parts business of assets/staff/knowlege)! Reduce, reuse, recycle.
(Some, but not all, due-diligence is worry alleviation through hazing ritual business theatre.).