Sale is up and running....
MYSTERY BOXES: EVERY Mystery Box ever released is currently available for 12 Gems (aka 50% off) and this link provides all the known info for each box --> https://forums.storm8.com/showthread...ster-Box-Guide
EXPANSIONS: I only have the last few available and it looks as though the gem cost has been cut from 150 to 110 for each expansion.
NOTE: The Magic Oven is available via purchase for 200 gems or in the current iOS Value Pack (along with parts for current goal ovens) for $4.99 USD.