When was this MacBook Pro bought?

I have a MacBook Pro that a friend gave me that has fallen to the NVidia failure. It is a mid-2007 but I have determined that it was manufactured in June 2008 by using the serial number. I was wondering, since I cannot get any credit card statements or a receipt, if anyone could tell me how to find the purchase date Apple has. It says "Valid Purchase Date" on the Apple support page but it doesn't tell me when that was. I really need to know because it could fall under their replacement program. If it doesn't, would there be any case that I could make to get it replace by Apple. I have gotten 8 replaced in the past but they were still under the 4 year timeframe. This one is probably right on the edge of the window.

Thanks