Ok so reading over the logs I've created a diagram to visually explain what is going on here.
While you may claim that he is responsible, the chat logs very clearly did not match as well as what @RsgpDeals pasted into the PM to you, did not match your skype conversation which is a big red flag. Also going to his profile it claims his ONLY skype is oldschool.deals. It is very common for large sellers to have impostors with the "live:" usernames taken to pretend to be them.
We have no way of knowing who the impostor is, it could be RsgpDeals, and with the same logic and without proof it could also be you. And who knows, a lot of the times these impostors don't even use our forums logged in, as profile links are easy to get publicly. We can't place responsibility on anyone. It's unfortunate when these type of scams happen but theres not much we can do other than warn users to make sure you are talking to who you think you are. (VERIFY USERNAMES ALWAYS on the forums).
I've removed the feedback. I am sorry for your loss.