Where can I sell my used manga in NY?

I used to be a pretty hardcore manga collector, but as time went on I've grown out of reading manga. Now, no one I know would like them since many of them are Shoujo (girl oriented comics).

I've heard about Book Off, but I've been told they have a tendency to rip people off, even if the books are in great condition or rare. So that brings me to the question of where can I go to sell these darned things?

Heck, if anyone reading this is interested in buying some, just say so.

I've got a ton of titles, and I'm willing to let them for a reasonable price.

I just don't want to sell my books at a store where I might get ripped off, and wind up being better off tossing them into a trash compactor.