What would you say was the average age of refurbished models sold by Apple? I am assuming they are only a few weeks old in that someone received the goods but was either unhappy with it or the item was faulty in some way. How likely is it that someone had the item for months before sending it back to Apple? 
Also is it likely that refurbished models are scratched/dented in some way?
Also is it likely that refurbished models are scratched/dented in some way?