I created a facebook group (Northeast US Pinball For Sale group) that is similar to this thread:
https://www.facebook.com/groups/NortheastUSPinballMachinesForSale
I found it time consuming to see many for sale posts on facebook that were too far away to pick up. I also see lots of interested buyers from far away that don't want to pay to ship. If the group gets traction I think it could be useful and solve those issues.