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.
This is no longer true. I have 2FA and I can't get basic verification because I am not in United States, don't have US phone number and "my name doesn't match public records". So I can only do enhanced verification which also doesn't work (name mismatch) and then my only option is customer support which basically doesn't reply to tickets. There are 1000s of users waiting for months for a reply with funds frozen. Check comments on their facebook or twitter posts. All flodded with ticket numbers and people begging for Bittrex to answer.