I was thinking about buying an “EVE Online Premium Edition” code for my account but i don’t know if it still works.
This is the one and only package i bought when i first started playing
1 x Odyssey offer - 90 days + Caldari starter
A few years back any old unused codes became obsolete and no longer work. I recall seeing the announcement from CCP about it. They let everyone know at the time to use them or lose them.
All you can do is attempt to use the code. If it doesn’t work, then it’s basically expired.