We are a small charity working with street kids in Thailand. We are using an iPad 2 which since updating the ios to 8.1 has become sluggish to the point of being almost unusable. We are not in a financial position to purchase a brand new iPad as 100% of our funds are used for the kids. We would appreciate your advice as to a suitable iPad used model to purchase. We really only use the iPad for emails, our Facebook pages and photos. It is only the sluggish performance of the iPad 2 that we are using that is making it unsuitable for purpose. We wish to maintain a large screen format so not looking to the mini. We wish to stick with the iPad as our phones photos apps are also linked to this. Any suggestions would really be appreciated.