ProComp/Speedmaster aluminum heads

I have the start of a budget for these heads. I just am not sure how to prepare or search to be ready for a great deal??
Amazon or Ebay discount? Do they start letting people know that something like a promotion will be available? I don't have any PayPal's or Ebay accounts my wife does have an Amazon account.. Online shopping really isn't my thing except for like Jegs or Summit. And I still call them with my credit card...