The $29.99 "in anticipation of SampleTank 3" sale in May included Miroslav Philharmonik CE (not full), SampleTank 2L (not XL), Sonik Synth 2, SampleMoog, and SampleTron.  Also, it wasn't a Group Buy so that was the pricing without getting anything additional for free.  XPansion Tanks were reduced in price too (but also not in any Group Buy type of format during this promotion).  Hope that clarifies what you may or may not have missed out on.
 
None of these products would qualify for the lowest upgrade pricing during the SampleTank 3 preorder period.

Well, I think I'm going to hold off for right now.  I certainly don't NEED it.  And I really want to learn to use Hollywood Strings and Brass before I buy anything else. I'm going to do my best to resist GAS for now.