Seriously ? You want to make a profit from this game, yet you still price goods OUTRAGEOUSLY in the store?
Get a daily player to price your goods up and price them accordingly for gems, I'm pretty sure you may make some more money that way...
Your silly Wholesale Tab - forget them... vastly over-priced and never will be worth the gems.. None of those in that category ever will. Get rid or revise.
Decorations - same as above, put something new in there at a reasonable price that people want, you may get a small return...
Adventures - Well you kind of killed that atm with the PH2 able to make MFs, put the gem advs as affordable or findable or purchasable for MFs (in particular the lower level volcano advs etc)
Just a few suggestions from me that may make people start buying from the store again..
As usual, tell me I'm wrong or add your own thoughts...