Question on reinstalling everything

This isn't super vintage, but I figure it's good enough to ask here. I have an old Windows 2000 era laptop. I'm going to sell it but I want to wipe the drive and reinstall everything first, to get rid of any old user data. I've done stuff like that but not with a system this old.

I'm guessing I need to find a windows 2000 disk, or can I find an iso somewhere to put on a flash drive? Then just re-enter the old product key? Should I back up or track down any drivers before wiping the system? Generally these days the OS install has all of the basic drivers to get going and things are pretty automatic, IDK how stuff from this era does in that regard