Blocktrades, according to my meticulous research, will always get you very, very bad deals :-/. Changelly is by far the best one, then a close second place is Shapeshift. For example, 1 SBD on blocktrades is roughly $0.94 USD, while on Changelly it's around $1.50 to $1.60.
www.changelly.com is my suggestion to you if you aren't going to go with Bitfiniex or Bittrex.
Thanks for information. Which coins I'll get for sbd on Changelly?
Anything they have listed, check their list out.
I've noticed that the Blocktrades prices are really bad. Why is that the one that is being used for everyone on SteemIt by default? It works very easily but the trades are soo bad. Today I just started sending SBD directly to my Bittrex for BTC instead of Blocktrades. Thanks for the Changelly suggestion @matt-a. And thank you @oldtimer for pointing out the issue with Blocktrades.