I am clearly not an expert on expired domains or building pbns. But I made some experiences now and you guys on bhw helped me a lot not to waste too much money (well I actually wasted some money with trial and error but could have been worse...). Therefore I would like to share one little piece of advice that might be interesting especially to the newbies: Most guides for expired domains / PBN buidling say you should stay away from deindexed domains because they are probably penalized and will be hard to reindex. I found that this is mostly not true. I bought 4 really good PR3/4 domains (PA/DA/CF/TF 30+) for less than $200 total. Deindexed domains often go for 50% or less of the price of indexed domains with similar metrics. Probably because people are scared or think these domains are all penalized which is just a stupid generalization. My domains were all non-profit sites with no spam backlinks at all, even some gov/edu backlinks and no weird SEO ever doing some weird SEO shit on them I put one article on each of them and got them all reindexed within 2-5 days. Bottom line: Check deindexed domains as well and dont be afraid to place your bid if everything else look fine. They might be awesome and cheap opportunities.