The EB Trio of three decks has only 20 slots, so I would expect them to go really fast. That said, if you pick up one of the gilded tier (200 slots - which I also expect to go fairly fast) and add on one of the merlot and one of the slate versions, that is only $5 more. $65 for the EB or $70 to package it yourself. I wouldn't fuss about just getting the single gilded tier or do two on two different accounts.
I do understand the issues you have and need to increase the price for the gilded decks, even in bulk. That still doesn't comfort my wallet.
I went back and checked and my Luminosity order was a mind-numbing $390 for the split brick tier and the add-on luxury brick add-on. No regrets though.