Yep, it could take a long time or it can be speeded up too, depends entirely on the search engine marketing strategy. In the meantime, it is impossible not to acquire some incoming links, it happens naturally to some degree. If a webpage can ammass a volume of naturally generated links it can speed up the process of attaining credibilty and importance even more.

There is no doubt though, highly optimized well-crafted webpage/websites fair better in the SERPs, their rankings are easier to maintain and their market share of qualified traffic evolves as the web site promotion grows.

Try to gather links in a normal manner. I mean not to buy links. If you want your keywords to have a decent rank then you must build backlinks in proper way. Much better if you can get high pr backlinks at this could also increase your site pr.

Yes, buying links is safe, if you choose good quality sites. You should better buy links to the pages of your site that you want to see in search results for targeted keywords. Besides, optimize web pages that Google has already considered authoritative. Identify them by using Google Analytics, and service for Google results analysis (KeywordSpy.com, SEMRush.com, SpyFu.com, SEOPivot.com, MarketSamurai, Google Analytics).

The one thing we need to know before giving you an educated reply is what is your site about-is it a free hosted site or a paid domain etc.

All these things factor in-leaving out the moral questions and thinking only in terms of results.
For example-if you are using blogspot or any free hosted site then it matters not of you get 10000 PR4 links pointing to you-you can not get PageRank.

Using forums,leaving comments on ranked sites etc,all these things will bring yopu more traffic and help others find you in SE much better then paying for backlinks.

I earn from people buying links on some of my sites,but would never risk my ranking on my main sites by selling them through any paid service.

A good site with a good niche,original content can get ranking and great search traffic without ever paying a dime to anyone.
If you do not have those things going for you then perhaps pay for some links will help in the short term-but never for long

Why you do not build links yourself.
Buying link is not safe & valuable

For me it is okay to buy or lease a links from those sites with highers rankings you do it in the purpose of increasing traffic to your site and help your users, not just only for PR.

Hey guys!
Again, thank you everyone for the discussion. i am so sorry i couldn't really participate in it because i doesn't know anything about SEO and just learning..
So, what do i have now: i have eventually tried Seopivot and can tell you that the service is amazing O_o it shows all URLs of my site that are known by Google, up to 300 positions! so, i didn't buy links as i understood that it's not safe, so i worked with internal linking..
I guess that some of you might be interested, that's why im writing this.
Hope it will be useful

When your competitors report u and google dectect your buying, then u gonna be penenlised! Maybe banned!