It doesn't surprise me at all. I mean look at all the stuff on Ebay and the prices it goes for. Supply & Demand. Simple enough. It is amazing though how many people out there never research prices on different sites and etc. I mean a lot of times there is a better deal than Ebay by and far!
Then again lots of people will go and buy a car and not haggle it down. Or heck people will buy anything for face value (that is the face value of what the seller wants for it!).
I mean I just sold some extra figures (Transformers) on Ebay myself for twice what I paid! I would have never bought it at that price - but other people do!!!
Or heck we could also look at it this way - MR is selling the mini saber cases for $19.99 plus $10 for shipping and TSV is selling them for $5 less. I don't know about you - but I would have liked to save $5 on them.
Unfortunately it is just the name of the game!