No more updates means no more value.
iPhone 8 Plus review: still massive – but not in a good way, iPhone 8
iPhone 8 review
When does an old iPhone become unsafe to use? - The Mac Security Blog
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If you have an iPhone 8 or iPhone X, you should probably sell it now
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My iPhone has been locked out and is now unavailable, can't afford to erase no matter what : r/applehelp
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What are the pros and cons of buying an iPhone 8 in 2023? - Quora
Best iPhone 2024: every available Apple smartphone compared
If you have an iPhone 8 or iPhone X, you should probably sell it now