hi, We are starting "Link building campaign" for a website which currently has good hold on Search engines. My question is : Could you guys advise me what is a good market rate for buying links for say a site having a PR of 4, 5, 6 & 7. Considering we buy links on home page itself. Thanks in advance.
it varies by niche. not only the niche of the site you're advertising on, but the niche of your site as well. people will expect a lot more if you have adult/rx/casino type stuff, for example. you could look around buy text links or whatever to gauge how much things would cost. personally, though, I'd never buy links unless I think the direct traffic from the link itself will provide an ROI; pagerank benefits would just be a side-benefit.
You can check link values on: http://linkvendor.com and http://www.adsbay.co.uk/Link_ad_price_calculator.php (the latter seems a bit pricey) Find a potential link vendor and do your research on them. Check if their pagerank has been obtained by fraud or is legit.