If you're a vocaloidotaku member, you'll have a coupon code pm'd to you to get Oliver for 25% off.
If you're not a member, sign up before January 31st and you'll still be able to get the code!
I have him and I made two songs:
http://www.youtube.com/watch?v=VmzTX7znX0I
http://www.youtube.com/watch?v=GDFPMNRNTyI
Vocaloid World
This is a guild for all Vocaloid fans!