SentrySwiss is a scammer.

http://imgur.com/a/MvX0F

I have provided all the screenshots.
I have resolved his skype IP and he has the same IP of Christen.Clark who had done the exact same thing to scam me.
He went first and paid the correct amount on Paypal, after I gave him the items he disputed the transaction saying it was an unauthorised transaction.
The other time he had bought 2 games from me and paid the correct amount as well, and had done the exact same thing to dispute the money.

EDIT: His skype profile: http://prntscr.com/3hkasl

 

Need you to post his skype profile ID picture

 

http://www.sythe.org/report-scammer/1711015-sentryswiss-scammer.html Banned for scamming and ban evading.