Unable to Validate Your Purchase Date

Hello,

I need help. I'm planning to buy a 2nd hand macbook air m1 in a facebook marketplace here in the Philippines. But when I checked the serial number online, it says "." The seller/person says it was purchased in the US.

I am aware this thing comes with expired warranty or was purchased a long time ago. Are there any issues in the future I'll be concern of? Thanks in advance and have a great day ahead.