TAC must have gotten some feedback from Demo's who were not happy about making the SOTM and limited edition stamp sets available without a minimum purchase...so it looks like at some point in the very near future, the SOTM and limited edition stamp sets will be made only available with a $30 minimum purchase (before shipping & tax).
So if you're thinking about getting September's L.E. stamp set take advantage of it now :) It's only $5.95 Here's a preview for you look for more samples coming soon.