Wade:
Just had a quick browse on TM and secondhand 5s, S5, HTC One M8 are all selling for around the $400 pricepoint, so right now the resale is better on an Android :P
Would be except for the fact the iPhone has had 6 months longer to depreciate (ip5 and S5 launched at similar pricepoints). As I said before you only have to look at the S6 vs iPhone 6 pricepoint. How can a phone thats been out 6 months longer have a higher value? Well its far more popular than the Samsung, the iPhone 6 actually increased in RRP since launch where the S6 went the other way..
Anyways what Apple does is perfect for 2 year upgraders like myself. Last three phones iPhone 4/5/6 have all held their value remarkably well at the 18 month to 24 month age range. Making upgrade almost free after handset discount on contract with VF