If the buyer sent his offer through eBay Messages, which is at the bottom of the dropdown menu at the top of most pages under My EBay, there should be a Reply button on it.
Sometimes it takes a minute to load.
If it was a text or email not from eBay, be very wary.
And if it has anything to do with a vehicle that you are not selling on eBay but elsewhere, it will be the first step in a scam.
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