I've got one of those creative CD drives... got it for free though, and its not in use... never used it actually, now i know why my friend gave it to me...
Worst purchase... would have to be a Vantec Socket A heatsink... don't remember the model number, but it was the one with the 7000RPM fan. Aside from the noise, this was my first build (and Athlon 1.333), and I didn't know that just because you could plug that fan straight into the motherboard doesn't mean you SHOULD. I can't imagine what my motherboard went through, but after about 2 months, I'm going along, and suddenly, my computer reboots, and then restarts every time windows loads. for some reason, it took me that long to realize that my computer wasn't nearly as loud as it should have been.... The motherboard still worked... mostly... except that the CPU fan header didn't work, and DDR Slot 1 didn't work. my CPU was fried, along with my 256MB stick of DDR266. The motherboard, an MSI, got shelved and replaced with an Asus A7M that lasted me for a good while. Oh yeah... a month later, the MSI Video Card I got with that above purchase died... Ended up running a Diamond Monster Fusion (Voodoo Banshee GPU) for a while. total loss on that (CPU, Memory, Mobo, Vid Card was $600).
I'm surprised I don't see more of these, but I got a 60GB 60GXP as a christmas present once. I actually requested that drive based on several reviews stating that it was one of the best performing 7200RPM drives on the market. That stupid POS lasted 6 months before giving me the click of death. I RMAed it, and the thing started again after another 6 months. I gave up then. The thing's sitting in my room somewhere. It would actually probably still work, since the first time I got a bad sector, I just backed up all my data and backed the hard drive up in a box and shoved it in the top of my closet, never to be seen again.
i've made more bad purchases, but more often it's not the fault of the hardware, just the user (me). I've not had the greatest of luck. except, somehow, in getting an old ProGen Pentium MMX 166 system to work... It used to run Win95, but it's now running Win2000 Pro with a 30GB hard drive. All it does is word processing for my sister, but the darn thing boots up faster than my Athlon 1800XP did.