I just bought an Ipad 2 64gb Wifi on Ebay.

Can I purchase Ensquared insurance? In case of claim would the proof of purchase be the Ebay transaction or paypal receipt?
I want to get the comprehensive coverage.

Ensquared is a supporting vendor of iPad Forums.

You should probably direct a question on the companies sub forum here http://www.ipadforums.net/ensquared/

Thanks for your inquiry, and welcome to the forum.

You need to find their web site and look at their policy. When in doubt, call them. If needed, they might get the history of the device in making any determinations.