I hate to threadcrap. Please don't take it as such.
I have two of these boxes, they're test machines at work. Both are Dell GXa PII/233, just as advertised. I scavenged them from a drop-off area in the hall reserved for abandoned machines set out for PC-recycle.
Both boxes are highly unstable. At first I thought maybe it was a screwy install of the OS, so I tried several more times...on each machine. I tried Win95, Win98SE, ME and 2K. Didn't matter, they would blue-screen on reboot after installing the OS, the anti-virus, corporate firewall software, or other software. Sometimes they blue-screen simply by dropping a clean image and booting. I'm not the only one...my company bought quite a few of these boxes, everybody has the same complaints, everybody tosses them out first. Nobody wants to deal them.
Another thing...these are P6 machines, but for some reason 32-bit operating systems run slower than the 16-bit kernel operating systems. Never seen anything like it. I have an old P5/166 running Win2K that spanks both these machines in both perf and stability (24/7 for 3 months now).
They are $50 for a reason. I dunno if it's the mobo or the RAM or a combination of the two. Maybe it's something else. Maybe you'll get lucky and get a stable, fast machine...but everybody I work who has used these boxes can't wait to get rid of them...which is why you can always find one at the end of the hall in the "junk pile" every month or so.