Amazon. Only $10.50 now, but some of the reviews mentioned that it has been anywhere between $15-20 in the past.

I know this is a "cheap" harp, which are usually crap, but it really sounds kinda nice for what I paid for it. The reeds on the G side buzz a bit when it's cold, but that goes away as soon as it warms up. For just dipping my toes into the tremelo waters, it didn't seem like a bad investment, especially since the reviews were mostly positive. I dont doubt that a more expensive harp is better, but this will do for me(for now)