It's really hard to make that call for you. Would I invest in any hardware upgrades to that machine? No! That machine is circa 2007. That's eons in computer time.
Does it still work?
If not, buy a new system.
There's NO way I'd do anything to that machine (except install Linux and toss it as another server on my network.)
About umpteen years ago, maybe as I was tossing out a 486-33MHz machine it dawned on me that a computer is the only device I know of that as it ages, loses no performance but loses all value.
I paid about $3000 for that machine back in 199-something. 10 years later, it was still working JUST AS WELL as the day I bought it, yet it had become effectively worthless.