Business Insider's scan of platforms like eBay and Facebook Marketplace showed hundreds of listings touting phones with TikTok and CapCut installed.

Why can I get so much for this 3-year-old phone? Right now on eBay a used iPhone 7 goes for around $150 to sometimes over $200. But a Galaxy S7, which also came out in 2016, sells for under $100.

some sellers are also trying to let go of older models like the iPhone 7. One eBay listing put up a used iPhone 7 for sale for $3,000. And it isn't just the volume of listings that's notable ...

Or, for hundreds or even thousands of dollars more, you can buy a used phone with ... Poshmark reads ($3,500). “iPhone 14 Pro UNLOCKED! W/ TikTok,” a listing on eBay calls out ($3,000).