I'd be interested in whether this PSU is a new purchase...or one from an HP system you own or owned.
I see a lot of refurb PSUs offered via eBay...looking at the lack of details provided, I see that there is no mention of warranty, only the typical 30-day return/RMA blurb. I also see that Amazon offers access to same model and throws in the standard declination of responsibility blurb. For the prices that I see for these PSUs...I would just go with one which has warranty provisions spelled out and which is from a standard PSU-provider.
No advice , I'm just a user like you.
Many may not realize this, yet the PSU is likely the most important component of one's build. Why is that? Inferior units (such as the ones hamluis describes) can take a lot more with these than the PSU itself, also components that's costly to replace, and have been known to cause fires. That's right, no way would I consider a sub-$50 PSU in any PC of mine (that I've replaced), there are promos, rebates, whatever to have top line PSU's. For instance in the last 6 months, have purchased two EVGA Supernova G2 650W units (Gold rated), and the lowest priced one was a Seasonic M12 II EVO 80+ Bronze edition (still fully modular, though price wise, as low as I'll go). That was a compromise purchase, though still met my standard, Seasonic is a reputable brand.
What I want do, is purchase a $49.99 case/PSU combo, for starters, the PSU likely belongs in the outdoor recycle bin, I wouldn't give it to my worst enemy (for fear of being sued), and I bet the case begins to bow the more one installs inside. If too many components, it may collapse .
Seriously though, one needs to keep quality control in mind with PSU's, while there's some items to go cheap on eBay with, this isn't one on the list. And one should also consider future needs when purchasing, yes, there's the GPU this week, next month, go for a CPU, then add accessories within the PC, all of these little things adds up. While some has stated to me that my PSU's are flat out overkill, I take it as a compliment.
Because I don't want to be the one with a burned down home over a sub-$40 PSU. If one has to save money in the short run, make it a less important accessory, even CPU's of the same gen & LGA can be upgraded, and one can safely skimp on SSD's, optical drives & other accessories. I'll even compromise on the MB a bit if needed, as many of the exotic features, don't use anyway. To me, it's more important to have a long term warranty, quality build & a PSU not under stress.