Really? For the Base Mini they charge 100 for 8GB of RAM. Looking at Amazon, Newegg, etc. They charge $70 for 2x4GB of basic sodimm RAM. That's only a price gouge of $30. Now if you are buying a base mini and taking it all the way to 16GB they charge $300. That is a bit of a gouging as you can buy 2x8GB of RAM for $136. Now on the mid-mini they are "only" charging $200 for 16GB which means your gouging is only about $64. Now I realize if you bought a mini with removable RAM you could always sell the RAM that came with it, but how many people want 2x2GB sticks of DDR3? Most of my upgraded RAM from MBP's and Mac Mini's are just sitting in a drawer "just in case".....
My point being, is that RAM has gone up considerably over the last couple of years (for awhile you could buy 16GB of RAM for like $80), now it's $130+ for basic RAM.
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You can save some.... Sadly 16GB of RAM (2x8GB) is going for $130 at the cheapest I can find for basic slow timings of 1600mhz sodimms. So $200 (if taking the mid-Mini to 16GB) isn't terrible.