A good deal of plastic surgery these days is used to change or enhance sexual characteristics, both male and female. If you're considering this kind of work, remember that while it's possible, it's fraught with even more complications than regular cosmetic surgery.
As with anything, unless you already have a provider you like, it's a good idea to get several quotes on any plastic surgery procedure before going ahead with it. That said, don't necessarily take the lower bid, especially if it's much lower than the others. Do your homework first.