No game that is made on RPG Maker is worth almost $30. Especially when the tilesets, sprites and music are not made original from the ground up, while the maps are big and bland.
You will be lucky to get people buying this for $10, though $5 would be realistic and it would be wise to show off one animated scene in a preview, to let people know what they may expect.
Sorry for being harsh but this is simply fact.