Have you ever used Long tail keywords for link building and SEO, they are less target keywords but can drive good traffic

I would like to know if you have tried those. Infact i have seen in PPC and SEO, Many people think that only main keyword are good ones and provide traffic

Well, targeting long tail KWs with high / fair traffic is a good KW to target first.

Let me give some example on this. This is just the physiological one. Test it.

Which keyword do you choose if you want to buy a second hand car?

1. Car
2. Second Hand Car
3. buy second hand cars
4. buy second hand cars in cheap rates.

I definitely go for the 4th one. Being a user definitely user chooses the 4th one. Am I right.Therefore targeting long tails keyword is not a waste.
Why don't you make a try yourself? When I  see my analytics for my website I can see maximum number of long tail keyword. So I must say they are equally important as the only keyword.
Regards,