HB / PB help with profile creation -> Fetch mail only when you have mail

[Rock]

Hello,

I am trying to make a profile where I buy items from the AH below a certain price and when done it will get them from the mail box. Sometimes it does not find items but will still go to the mail box. How do I prevent this? In PB I dont see a place to add logic within the "get mail" action.

Thanks in advance!

Regards.
Jaime