Caveat venditor.
Be careful when meeting up to sell bitcoins in Europe. There have been incidents of syndicate-style crimes perpetrated by a group of people.
If anyone intends to take up this offer, meet up at secure and safe locations such as inside a bank or within proximity of the police or security services. Never go alone. Take someone or a few persons with you who can monitor the transaction as it progresses.
I strongly recommend transacting inside a bank where money can be checked for authenticity. And preferably deposit the money in your account after the transaction. There is a risk of being followed and assaulted to recover the money paid for the coins. Worse, you could be forced to send the entire coins you have under threat of being harmed or even killed.
Do NOT fall for sweet words and terms such as temptingly high margins above market price but with conditions attached such as doing the transaction in a location of buyer's choice. This is dangerous. Don't do this at places such as a hotel room or inside a car or a parking lot or in a deserted location where nobody can help you if you are assaulted. Assault is the least of risks. You might lose your bitcoins and your life.
Tip: contact details are skype and a Russian email. Be extremely cautious.
Well... first of all I don't see why if the vendor is from Russia it has to rise an alarm or something, that is kind of inappropriate..
And second, if you meet in a bank and try to deposit the called 50k you will be definitely asked where the money comes from. you can just say this guy gave it to me in change for Bitcoins.
I think the best solution is to trade the money in several parts, maybe the bank idea is good but knowing the deposit limit without question asked.
good luck