https://ionomy.com/ had some good deals lately, I've been using it. But there are others too.
You could also use ProBit, Bittrex. I have an account on all of them, just in case. If think about leaving some STEEM/HIVE on the exchange, to make some trading and airdrop gain it would be good to check their latest post:
https://peakd.com/@probit
https://peakd.com/@ionomy
Excellent. Good tip there to have a few existing accounts ready to go incase of different situations.