This invitations look suspicious and very dangerous, if you are rich enough to buy 250 btc coin, you should be able to travel to sellers country and not the other way round, anything contrary you people can meet at a neutral country.
This is an high risk venture.
Hi this is very stupidity to comment bad on someone's deal without knowing anything
if you have doubt on deal, want to clear you can contact me
if you are not interested best to stay away
you are literally making mistake on commenting bad about others who you dont know before
I have posted my mail ID FOR CONTACT
I have posted about my requirement in detail
https://bitcointalk.org/index.php?topic=5194476.0interested guys can write me
others please dont disturb my business
best wishes