sorry for the long wait on the response guys. i will NOT be flipping these in any way shape or form. the reason i want all types is mainly because i am taking them apart for research on how everything really comes together. why am i doing this? one of my buddies at school is very knowledable about apple products and other electronics. we are going to try to make our own tablet or "itouch". its for sure a long run, but mine as well try. the reason i want different generations also is because i want to see how they have devolped in past years.