When searching for good domains for my PBN, I often come across good domains with good metrics and decent backlinks. But then you check Wayback machine, you can see they've been used as a PBN site previously or they've had crawlers blocked (obviously a PBN). These domains are often going dirt cheap. So what's so bad about them? If they still have a good backlink profile and haven't been used to advertise anything bad on them, then surely they must still pass on some good juice? What are people's thoughts on this?