Recently I was offered 3K$ to marry a foreigner.
I'm not really familliar with that kind of pratice and dont really plan to do it tbh but does anybody has experience in it ? Do you think it's a good price ?
A friend of mine told me that if I ever accepted their offer I should ask for 5K$ at least.
Depends on what country you're in. If you're American, don't even THINK of trying this. As someone already mentioned, you'll end up with jail and fines, and she'll end up banned from the U.S.
As someone who is familiar with the experience, you cannot "fake it." During the marriage interview process, they interview the husband and wife separately, and will ask extremely random and personal questions.
-"What side of the bed does he/she sleep on?"
-"What is her favorite food?"
-"Tell me about your sex life.."
-"Please provide records showing your utility bills together, references talking about your time together."
This is just the tip of the iceberg. You really do have to live with the spouse long term and get to know them extremely intimately and provide proof of such. You better ask for a minimum of $15K, because the pain is considerable, and if you are caught cheating the system in any way you *will* be discovered. Not really worth in IMHO unless the both of you really are in love.