That is, if I buy a new model every year, that would cost the most, but I'd also get a much higher price for selling my previous year model in good condition. If I replace my phone only, say, once every 4 years, my total outlay is a lot less but I'm also going to get hardly anything for my 4 year old model. So I think it would be really nice to see the total cost with resales taken into account, then people could decide on on how much they really value the latest model.