Kagamine Rin & Len
This is a unique Vocaloid in taht it has both male and female vocals, from the same source seiyuu.
If you want some pictures of Rin then read on!
é¡éŸ³ãƒªãƒ³&ãƒ¬ãƒ³ – Kagamine Rin & Len
ã‚ãƒ£ãƒ©ã‚¯ã‚¿ãƒ¼ ãƒœãƒ¼ã‚«ãƒ« ã‚·ãƒªãƒ¼ã‚º – Character Vocal series
Open Price, but recommended at 15,750 yen
Crypton’s Official Vocaloid2 site JP
Akiba blog’s first entry JP
Akiba blog’s second entry JP
I haven’t purchased this one as of yet due to my budget, but maybe one day~…