Is there any groups to exchange links(guest posts) from PBN ?

Hi,
I was looking around for groups(facebook/skype or what ever) where we could make blog posts exchange to our money sites from PBNs ? Lets say I have blog and some one else have blog so instead of paying every one $20-$50 for guest post we can do blog post exchange ( i will accept post on my blog with link to your money site and you will do the same) and it will cost less than $5 per post (to cover writing expenses) ?

You can try using myblogguest.com. Although Google has penalized it a few years ago, there are still many guest blogging opportunities.