I came here to ask the same thing. Binance, Bittrex, OpenLedger all confirmed locked, I think this is holding the price down as buyers then become impatient and dump unable to withdraw. wrote a bit about it on my blog. Will post ETAs if I am able to determine any, please let me know the same. Thanks.

https://steemit.com/steemit/@minerthreat/the-answer-to-the-steem-price-mystery-could-be-exchanges-with-wallets-in-maintenance-mode