i usually sell every 2 years, but now I am rethinking the strategy. So the most basic new iPhone costs $650 at year 0 (release date). In year 1, one year later, you can probably sell it for 450 if it's in good condition. In year 2, you can probably sell it for 250 in good condition. So shouldn't everyone just sell their phone after year 1? Depreciation cost is $200 per year anyway so might as well get a phone every year...?