Antec earthwatts 500watt for dell inspiron 545?

[jijoslin]

hey I saw this on ebay and was wondering if it will work in my inspiron 545?Antec Earthwatts 500W Power Supply

P/N: EA-500D

Used Tested Working

AC Input: 100V-240V / 9A-4.5A, 47-63Hz

 

[saaiello]

Not a good ideal to buy a used power supply dont mess with a computers power supply people tend to think oh the power supply isn't important but let me tell you if you get a bad power supply it could take out half your computer when it blows up.

How much you have to spend on a power supply?