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Apple this month quietly lowered the trade-in value on many older iPhone models. The iPhone 13 Pro Max was worth up to $650 on Jan. 13, according to an archived version of the Apple trade-in site, while its maximum trade-in value as of Wednesday is $570, a decline of more than 12%.
The value of an iPhone 13 Pro dropped more than 14% in the same time frame, from a maximum of $550 down to $470. The standard iPhone 13 dipped 11%, from $450 to $400, and the iPhone 13 Mini went from $380 down to $350, a drop of about 8%. (You can see more changes in the chart below.