Can someone exchange for me ?

Got 99$ in skrill and i need bitcoins

Hello,

I just opened some wallet i not used for a month now.
Here is the strange story now:
I got 0.5 btc on the date of may 5 this year.
But i have no clue from who and even why because i know 100% all my transactions and i would 100% not forget a such large amount.
Now belive it or not but it's not my money and i would like to return it to the sender but the wallet he used to send it from seems like some exchanger to me.

Anyway i can find the original sender?

I do have 2 vcc's to instantly verify your paypal exception is usa an canada!
Price per vcc only 8$!
If you need this contact me!

Selling invites for www.torrent-syndikat.org torrent tracker (german content)
Invite price 15$

You go first else escrow will be used

Ab welcher summe glaubt ihr das sich ein Trezor lohnt?


Ich überlege ob ich mir so ein teil kaufen soll aber ich bin mir halt nicht wirklich sicher ob es sich lohnt, ich rede ich natürlich nich von nur 2 bitcoins hier.

Danke