I will deliver expired domains for PBN with wikipedia links

This is a cheap $20 service. Please dont ask for a custom domain name. You dont need domains related to your niche in order to build a PBN. Extensions sold are com, net and org

Wikipedia is the 7th most visited website, has a PR 9 and DA 100.
Having Wikipedia backlinks passing authority to your website could do wonders for your ranking.

What can I do with them once I have them?
You can 301 redirect to your website, you can upload your website on them or you can sell them to others for a higher price.

Do you also guarantee any metrics or other referring links?
The only thing I guarantee is that the domain has a backlink from Wikipedia.

No! Some of the domains are expired for years.

Once you register it it will be indexed back in a few days.

Have this domains been used before as PBNs?
No. I manually check each domain I send in archive.org

$7-$12 depending what register you use. I prefer Godaddy.