you can make purchases from LIQUI Or Bittrex . Why you're making from the forum .
He had created this thread before HMQ got added to bittrex, just look at the thread date.
Selling HMQ at this point is just dumb. It's like buying a pizza for 10,000 bitcoin.
Maybe he wanted to invest in other project, or he has additional amount, moreover, if he sold them for Ether, he is in profit now considering Ether price.