Paid links and non-paid links are all links. So make sure you spend your money on the right places to ensure that you get the result you wanted.
As long as you keep everything natural, it's OK. Don't get too many incoming links so often and try to get relevant links from reputable sites (with high PR)
yes you're right. the most important for both are coming from high PR site and related topic with our blog.....
It's definitely important, as someon has already said, to keep them looking natural and relevant. Don't go for spammy, link farm type sites.
Paid links are OK in terms of raising positions in SERP... Just make nice anchor texts and check where you place your links. I have had no problems with my sites' promotion, based on paid links...
Many people buy links, including some of the heavyweight sites out there that rank for extremely competitive terms like casino, insurance etc. Whether you buy links is your choice. It works for many people as you get to chose which anchor text to use to link back to your site but there's always a risk that the site you're buying links from has been penalised and won't pass any SEO value to your site.
Both paid links and non-paid links are links. But you should know to keep all the paid links natural and relevant to your sites.
according to google webmaster guideline, paid links are supposed to have nofollow attribute added. you are allowed to buy links for advertising purpose but not for passing link juice or page rank. no rule is however broken if you dont get caught. if you must buy links, make sure you buy from a site that doesn't advertise link sale on the site itself and sells links discretely
I'm gonna try an article service this week http://www.submitinme.com They have packs on confirmed links and think that is interesting. But for paid links ... I use TNX but only do cherry picking high PR sites, since there is a lot a crap there.