Your Thread Doesnot Looks Clear As Of No Payment Proof Is There...
It means the user markcoins haven't Scammed you for any amount..
Instead He Didnot obey the auction rule which is too bad..
If he won the auction he should surely be serious about it and should deal further if He made a BID..
This says that The user "markcoins" Doesnot Follow his Words So he may be called "Untrustworthy" Because this tells us that He can anytime Deny about the deal or Come Back And would not do correctly what he would say...
However , He havent scammed anything So your thread is not Constructive clearly about the issue
You must construct it well and Move This Thread To Reputation Section