There are a few Sellers out there who have received calls – and a few more who have received many calls. Keep in mind that Ether is currently a bring-your-own model. Ether provides the tools; you supply the traffic of customers. Therefore, we find that those Ether sellers who have their own traffic receive many calls and those who don't have their own traffic don't get any calls.
It's completely up to you, the Seller.
By creating an Ether listing, you shouldn't expect that calls will simply come in. Though you should expect a great set of tools to sell what you say...