You see an "iPhone 14 Pro" for $400. The seller says it’s "like new." Before meeting, ask for a screenshot of (blurring the Apple ID email, but showing the serial number). Run the serial through Apple’s site. If it shows "iPhone 13 Pro Max" or "Invalid," you walk away. If valid, also run it through Chipmunk to check Activation Lock. If locked, do not buy.
Modern Apple devices (post-2010) generally utilize a 12-character alphanumeric code. apple serial number search
Once you have the 11- or 12-character alphanumeric code, use official tools to get the data you need: You see an "iPhone 14 Pro" for $400
Here’s a quick rundown of why searching your serial number is so useful and how to do it: Why do a serial number search? " you walk away. If valid