Hello... I'm looking to get a used iPad, either a 3rd or 4th gen. I won't be able to afford the air and maybe I won't need the latest tech to be honest. I need about 64gb. The Air would be $700 +tax, which is too much I think. I'm a musician, so I want to upload all my music (audio, video and score) so I can take it around for practice and performing. I guess I don't need the latest technology for that. But I do want the retina display. Could you help list some of the pros and cons and maybe a ballpark price of what I can expect to pay (fair price, doesn't have to be a hot deal) for a used one or ebay or craigslist? Thanks in advance.