unity free selling game in android market

Mobile licenses are now free. You don't need a trial, you can use the FREE version of Unity and release a game for Android with no issue, and yes, this can be a commercial game. You CAN'T however, release a commercial game with pro features, without owning a pro license. So no, you can't use a game you developed in pro commercially, unless you build it in the free version. You can keep the pro scripts, but they won't work without the pro license. Pretty much, you can not sell a game with pro features enabled without buying pro.