PBN, or private blog network, covers networks of widely different quality. Some are a handful of old niche sites with a real history and normal content. Others are domains that once carried links and now exist only to point new links at a main project.
What you get depends on the domain, its past, the links still pointing at it, its old pages and what happened after purchase. It is not a yes-or-no question.
Google's position on links
Google is consistent here. PageRank remains among its core ranking systems, and the links between pages feed into how documents are assessed. Artificial links built mainly to move positions are classified as link spam. Spam systems can neutralise the effect of such a link without removing the page from the index.
That caveat matters for the whole exercise. A donor's index status tells you nothing about whether its link counts. A rise in positions does not prove a particular PBN did the work. Google's internal valuation of links is not visible.
What to check before bidding
Domain history comes first, before any purchase: archive snapshots, retained backlinks, old pages, abrupt changes of topic and traces of previous owners. Domain age and the presence of natural links belong in the same check.
After buying, keep what is there. Old pages, URL structure and internal links. Deleting content outright on a site that had traffic and links can destroy the value you paid for. Keep the archived material for a while and add new pages gradually. Do not switch topic radically: a finance domain turned into a gardening blog defeats the point.
A separate site makes sense when the PBN is a long-term asset with its own content and links. A 301 is the option when the domain has strong links but rebuilding its content is not worth the effort. WordPress or a plain static generator is enough for the build; a template design with no updates is a bad signal.
Cost adds up from domains, hosting, content and maintenance time. Cheap domains can cost you time, expensive ones guarantee nothing. The real price tracks the quality of each part.
