Hi Alucky ^_^ nickel's worth of free advice it means that i give you an advice that worth a nickel ( 5 cent ) (as if i give you my advice for free) nickel means : a coin of the US and Canada worth 5 cents that what i think , i hope some native speakers tell us about it

It's only a small piece of advice ("a nickel's worth", 5c US), but because it's given for free, this is quite a bargain. "What I'm saying may not seem worth much to you, but I'm telling you this for free, so you should listen."

Here is an example: http://www.youtube.com/watch?v=h38srxvt6qE A "nickel of advice", advice that is not worth a nickel or not worth anything. Similar to "a penny for your thoughts" meaning that they have lots of advice or can give you much (sometimes unwanted or worthless) advice. Not worth a penny (lowest amount of payment), but if the receiver wanted to get/buy advice, the giver could sell them a lot of advice. The thoughts/advice is often worth more to the giver than the receiver. In the case of the video, Lucy enjoys tormenting Charlie Brown. Charlie Brown paid for advice that he would be better off not getting. Reference: http://www.wisegeek.com/what-does-a-penny-for-your-thoughts-mean.htm In the example you gave, the meaning is "for whatever it is worth" or "the advice may mean more to me than to would to you." Can be very opinionated. Depends on the context of the rest of the conversation.

Here's another phrase for you: That advice isn't worth a penny. :P