Hello everyone, i'm trying to buy some altcoins (some of them are not really famous for the moment) but i can't find a marketplace where to invest, i tried to sign up on bittrex, but impossible to do it for the moment (too many people on it), do you have good marketplace ? thanks 
Click this link https://bitcointalk.org/index.php?board=223.0 and do research. I think you will find all exchanges there, which altcoin do you want to buy?