At this point, Cryptic, you want to the Rommy Store to work based on the STF's- we get that.
What you need to get is that since you designed the game to max Rommy marks for bunny breeding every 7 to 8 days, AND you don't actaully have any content even close to STF's to balance it out, it is time for a 40% discount of all the items in the store.
Giving 300 marks for an item might throw you into cardiac arrest, but it is inline with 8 days for a bunny or five different sector patrols at 60 marks each. Keeping the prices the same as they are not without a mechanism for generatoring marks is the best way to get your customers burned out.
Bring the prices inline with the content you actually provide.