So you want someone to give you 10kBTC and you will give him ~330mil in cash, in a security house (?)... 
Either you are insane or you are full of crap. Most likely the second.
It's "only" €300 million now. The most commonly used €50 banknote weighs 0.9 g. That makes this deal weigh 5400 kg.Either you are insane or you are full of crap. Most likely the second.
Let's say for the shake of OP's fantasy movie scenario that we will skip this weight issue, ~5500 kg can be move in a car at any time during a day (LMAO) and just stick with the security *cough* my ass *cough* issue. Security house with €300 mils in cash?! And how you don't be afraid to tell in a public forum that you have that amount in a place? Who is your guard, Chuck Norris?!
Scammers like OP have a very good day if they manage to scam a fraction of a Bitcoin. Luckily, there are other scammers why want to sell 10,000 BTC for cash too, so they'll be a great match
So lets through an idea. Why don't you or any other with this set of skills make an algo/ counter/ report/I don't know? and check how many accounts post this crap? I guess numbers will show something that might be useful because we know that those idiots will try again and again. If I had these skills I will try to do something but I don't...
P.S: Maybe even a matching app, to connect the idiots to pairs... I bet it will be a great success!!!