Originally Posted by conv3rsion

most of the links you buy will be fairly worthless, even if they are dofollow because either

a) they will be in the same place the person selling them puts all their sold links or
b) they will be from low trust rank / low quality, possibly unindexed and rarely authoritative themselves pages.

if you can get high PR links for fairly cheaply then thats not horrible but the person you are buying them from will probably keep selling on the same source, reducing your net benefit. Otherwise he/she will price according to value, which means you arent getting high pr cheap.

Your money is better spent on outsourcing for people who can engage communities, comment on blogs, build more satellite sites, etc.