Also I would definitely recommend getting an IDE to CF or an IDE to SD adapter and backing up the hard drive to an SD/CF card so you don't lose that data.
...and one thing I neglected to mention is that I no longer have an old enough monitor to go with it, so it's been a while since I made sure it's still runnning. Might be gone by now =/
I haven't had a monitor with a vga port for a long time now (ever since I decided the old crt one I had connected to this old monster was just too bulky). I'm keeping the PC though. It's my first one (Theseus approved). Haven't looked to see if any sort of convertor to vga input is remotely viable and it's not really a priority.
The case is an old extra-tall full tower that doubles as a mouse table. It even sits under an L desk. I just prefer that height when leaning back in my chair.
At this point I replaced my oldest original hard drive. I rebuilt another computer using entirely the parts I replaced. Literal ship of Theseus dilemma right there lol.
If you count an old hard drive I've always had that going, easiest to use your old app drives any reinstalls may go more quickly plus any media files on there. Though my media is mostly on my NAS, pictures tend to be on a local drive. I'm not sure I've ever done a new computer without an old drive and I've been doing this for like 25 years. Though I tend to move the old files to a newer drive before the next upgrade so not a true ship of thesus. Though most times the GPU upgrade is done at different times than the CPU/mobo/ram to keep it cheaper.