So If I remember right on nicehash calculator giant x10 makes 30-50usd/day profit. So when will be B-version on market, can we expect a same profit?

you cant think about that cause difficulty will rise a lot ... profit wont be so much ...

Try it and put 1000pcs of miners. Baikal sells 1000pcs in the first batch?

http://www.miningspeed.com/list/lbryhash.php