Anything above 1000 exact search result with low competition and more than $1 CPC I think is good enough..

When there are no ads on the right side of google it means no advertiser think the keyword is worth to pay money for. Bad sign!

So so chances are that you might get visitors to your site but they don't buy anything.

Yeah... The thing is, when nobody is paying for a keyword, it's usually because that keyword doesn't make them money.

The reason why competition exists is because there is something valuable to compete for.

As Liam said, it is probably not a buying keyword.

Do a bit of research on buying keywords if you need to, in order to stop you from wasting your time. However, considering we don't know the keyword ourselves, you may still want to give it a shot. But make sure you do your research. Good luck!

This is what you need to do to get more telling information:

Download SEO for Firefox plugin. Turn it on, and repeat the search without quotations (broad search). Pay no attention to the number of results. Rather, look at the SEO information displayed underneath the first 5 results. Are they high PR? How many "Y! Backlinks" (yahoo calculated) do they have? This will give you a better idea of how tough the competition is, as opposed to just how many random sites might be out there.

You also want to make sure that the keyword is searched enough, so head over to https://adwords.google.com/select/KeywordToolExternal and run your keyword using broad matching, phrase mathing, and exact matching. This might uncover some information about the lack of google ads in the search.

Thanks for all your replies...
But, I still need help

According to all the info I have -
all I needed was to search Google in that way
(as I did above) -
that would give me a good microniche -

Now - am not sure.

Please help with some more tips.

No more ideas?
I had really expected so much.

Veena, I am surprised no-one has mentioned running your keywords through SpyFu - the basic service is free and it will tell you roughly how many advertisers are bidding on those keywords and how much they are paying per click, though bear in mind this is for Adwords for Search, not the Content Network (i.e. Adsense). But still, it should give you SOME idea whether people are willing to buy traffic for these keywords. If not then it's probably a loser...

There is no "all you need to do" with niche-hunting - sometimes you can do all this and more and still get it wrong, with no real reason why. But following these tips should certainly increase the chances of finding a winner.

Hi:

I have been following whatever has been told to me here-
so far no luck.

I guess perhaps people do not want to reveal the true tricks.