where can i check the previous price of an stock option?

Question

where can you lookup historic options prices?

I want to study where a call option has been throughout this past month.

Answer 1

In the past there have been free sources of historic option prices on the internet, but at the moment I do not know of any,

There are places like

http://www.marketdataexpress.com/

that will, for a hefty price, sell you the information.