Groupees.com: Attack of The OSTs 5 - Min US $1.50 (~AU $1.96)

This is an interesting little bundle. I bought it when it was a $1 mystery flash pre-sale, but it's only gone up 50¢ since general release. For that price it's worth buying just to see if there are any gems hidden inside.

It's a collection of full game soundtracks from what looks like highly-rated Indie titles (according to the descriptions). It ranges from chiptunes to full orchestral soundscapes, with lots to fill the gaps in between.

For $1.50 minimum you get:

Aqua Kitty by Electric Cafe
The Great Whale Road by Víctor Riera
Blendoku 2 - Original Soundtrack by Paper Sound
Hexage Games Soundtrack II by Kubatko
Various Artists - Frog Fractions 2: Original Soundtrack by Ryan Ike
Eric E. Hache, Mathew Valente - Infinity: Original Sound Version by Materia Collective
Wayward Souls - OST by Joey Grady
Music from Binaries by Will Morton Audio

Bonus Section:

Frogatto OST by Ryan Reilly (Orion) - Unlocked at $1000 (currently at $659)
Mystery - Unlocked at $1500