True, it won't always be that price range. Yes, the iPhone X could be worth like $640 in good condition on Swappa while a Note 8 is $380 in the same condition. I get that Samsung phones depreciate much faster than iPhones.
However, I think the 50% depreciation is more towards the trade in value side. It's not about whether if depreciation is sizable or not, it's about the % imo. If I could sell my phone for a 15% depreciation after 3 months vs trading in my phone for a 30% depreciation, that's a decent difference.
[doublepost=1552672057][/doublepost].
No, the s9 took a huge resale hit last year after its launch, it had nothing to do with trade in value, but demand or lack their of.
Since Samsung has increased prices this year without an increase in demand (actually s10 sales looks to be more anemic when compared to last years s9), depreciation projections might actually be conservative.