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Hi, I need help.. Bittrex has been unavailable for how many weeks now. Do you know other alternatives where I can trade my steemit dollars? Thank you so much.

Hm I'm sorry I don't know too well about steemit dollars but I found on coinmarketcap (https://coinmarketcap.com/currencies/steem-dollars/#markets).
You could try Upbit,Poloniex or HitBTC but better check first if they are reputable

Thank you so much. :) Will take a look on it.