I am a frequent shopper in the Bank and would probably spend more if the ability to purchase certain items individually was available. 

For example, I am stuffed with Resources because they come with almost every offer.  But, I do need Double Hero, Stronghold Coal, Hero Energy (but not those Books of Knowledge that come with it) the same with Shaman Power.

It would also be nice to be able to sell back to the bank those items that we do not need, such as Bronze and Shaman Experience Books. 

Once a player picks out the items he wants to purchase, the Price Suggested could be shown in his Cart. If it isn't a good price, the player could Save his Cart and check back later to see if a better deal has been offered. 

Thank you for your time and stay safe!