60 bucks isn't bad. Like anything else, you get probably what you pay for.
Myself, I find a good, cheap dealer for the parts I want and if I'm happy with them, stick with them. For example, I shop almost exclusively online at
www.mwave.com. I have absolutely no affiliation with them, except as a consistently happy customer. They're not the cheapest out there, but they're within 10% of the bottom.
Then, once you've found a place that you like, buy the item that you can afford, realizing that a "450 watt" power supply for 20 bucks is not going to be equivalent to a true 450 watt power supply for 50 or 100 bucks. The 20 dollar unit will have smaller heat sinks, will be rated for 450 watts at transient load (not steady-state), probably less reliable, etc.... all the shortcuts marketers know how to make these days, will be made.
When my power supply died, it managed to kill all my hard drives, my cdrom, my cdrw, and my motherboard. The only things that survived were my PCI cards. It should not have done that, but heck- it was cheap! :-| When a power supply dies, it should essentially short out or open the output circuit and you will see 0 volts at the output connectors, thus saving your valuable equipment... and your valuable data!
Anyway- decide what you can afford, or pick it up from a nice person here, and be happy with it. These are just my $0.02.
P.S. *Always* back up your computer. Get a cheap little USB disk and copy all your data files to it on a regular basis, at the very least. It bears repeating: Always back up your computer. Always. Always.
P.P.S. Did I remember my usual "Always back up" spiel? I hope so, because it's very important. Always back up.
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