Is this a good price for a power supply?

I'm upgrading my desktops Graphics card and to do that i guess i need a new power supply so is this a good price for a power supply and is this a good quality one? http://cgi.ebay.com/Dynex-400W-ATX-Power-Supply-Desktop-Computers-/290518221748?pt=PCA_UPS&hash=item43a43c43b4#ht_1650wt_1144