When Logos 7 came out I worked out (too late for most of the denominations) that you saved money by buying packages in individual increments rather than going for the top one.
For instance buy bronze, then silver, then gold etc all the way up to collectors rather than just buying collectors to start with.
The savings were actually quite substantial but it does seem a bit counterintuitive that you should do it this way.
Does anyone else have the same experience?