"eBay is also known to be good at tracing activity that goes on their site."
This is true and exactly why the individual that is having the problem cannot address it with the buyer themselves.
This is exactly where a group of alias facebook members can make a huge difference and help to correct the issues members are having with other members on ebay.
There is NO WAY for ebay to connect any private messages communicated between private group members on facebook to a purchase made on ebay. It is not legal for facebook to provide ebay with member information the same as it is for ebay to provide information to facebook.
What we propose to do is offer mutual help to our members, you have a problem with an ebay member, we will provide retribution for you without any involvement from you.
There are no ways to connect us to each other on ebay unless we were to be using the same computer, email account, or have mutual feedback.
We want facebook members to join this group with an alias account not associated with their main facebook or ebay account whatsoever.
Members will use their ebay account to make purchases on ebay from the target.