|Are you asking for a replacement recommendation? None of my recommendations would involve ebay.|
I tried finding any specs on the PSU you have/had and detailed specs don't seem to be available. That is usually not a good sign.
I buy 95% of my computer hardware at newegg.com. The best etailer on the web.
Below is a link to a reputable PSU that does have good specs and has a rebate and free shipping. See if this is acceptable to you. Just click on the link to take you there.
Going back to your issues. The fan may be revving due to a BIOS setting or possibly you may need to remove the heatsink. Boot into the BIOS settings and look for PC Health. Monitor the system semps in there for a bit and post the numbers back here.
Could be the PSU fan making the noise too.