These are the best prices I found out there for the I2 pen.

I'm using a Cintiq, though I never tried my I2 pen on the Cintiq before I sold the I2/

 

Good luck

 

http://www.amazon.com/dp/B00006B6LO/ref=asc_df_B00006B6LO1313252?smid=A2YLYLTN75J8LR&tag=dealtmp353252-20&linkCode=asn&creative=395105&creativeASIN=B00006B6LO

 

http://www.amazon.com/s/qid=1289221633/ref=sr_gnr_fkmr0?ie=UTF8&node=&search-alias=aps&field-keywords=Wacom%20Intuos2%20Pen#

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Ockham's razor- It's that simple