I have an AMAZINGLY good humble bundle deal for some music. The deal is gone now but it was "HUMBLE BUNDLE Melodic Mayhem: Tier 3." It comes with amazing music including some horror music.
It cost 1,650$, but I got it for I believe only 20$. If you wanna know how I found it, then you should go watch "GamesFromScratch." He talks a lot about bundles that you can get for game development. He's really helped me a lot.
Also I will be using some of the built in music in RPG Maker VX Ace for certain parts. I don't know if I'll change the battle theme, because I really like the one I have right now (AKA "Battle 8" and "Dungeon 9")
Battle 8:
Dungeon 9: