After purchase you will become an upright owner of Ecoinia brand, current source code, as well as future, unreleased development.
Am I correct in assuming that you're still going to maintain it on behalf of the new owner or it's just limited to a few unreleased features?
p.s. Or help please find places where I can sell my application.
Judging by its screenshots, it doesn't look like you've monetized it, so it'd be a bit harder to find a potential buyer but the following links might come in handy:
Note: Watch out for scammers and DYOR.