What retailers are you using?
You NEED to spend more than that for a decent cooler.
Does it not come with a stock cooler anyway?
That should be way more than enough...
It's a used processor without a stock cooler but I have a dual-core stock cooler and don't know if it will be effective or not as x3380 is a quad-core cpu! So according to my budget what is my best option? S1,silent knight or the stock cooler?