penalized for buying links?

If you sites got 1000 links in a day without any special change in content, Google becomes suspicious so he can penalize you for quick increasing in links to your site, especially if all these links lead to the main page. I prefer staying away from buying links - I don't have enough money to do it all the time so I see no use in doing it only one time.

I think buying link is not an illegal job.But you must consider the number of backlinks you are going to buy at a time.If the backlinks coming to the site are higher then expected then google penalize those sites.