Entertainment Earth currently has full cases of The Black Series 6-Inch Wave 18 in stock with a price of $174.99, which you can order by following this link.

If you dont want to purchase the full case you can preorder the new single figures in this wave. Price is $21.99 each with a estimated arrival date of August. 

Direct Links to new figures in this wave:
Tobias Beckett
Rebel Fleet Trooper
Han Solo (Bespin)