Basic account can not withdraw anything, because you can't get basic verification outside US. My funds are now trapped (possibly forever) on Bittrex.
Basic accounts are allowed to withdraw at max 3 BTC without any verification but just as long as you enable the 2fa. That's what I did and most of the friends I knew who are trading on Bittrex. But I already changed mine recently to verify my Bittrex account even though I don't really need the 100 BTC max withdrawal limit.