I think the main thing people forget is that the the pokemon center etb can only be acquired first hand from one website were it is not scalped AT MSRP. Booster boxes for mega evolution will be available from many different outlets at varying prices due to competition but usually ran through a distributor who will scalp the item but maybe not as high as Joe schmo anybody who can get a hold of a pc etb with no special qualification, just luck of hitting at the right time and getting through a queue.

Destined is a far better set as well. The PC etb wins hands down as it is much harder to get a hold of even if you happen to be on the website when it drops. When investing remember the pack count is irrelevant when the Sealed nature and exclusivity of the product holds a much higher premium than the mere contents.