"Unable to complete transaction: that item cannot currently be purchased."
I have 5000 Zen sitting there on my account. I want to purchase the Andorian ship bundle, but I get that message every time I try to buy it. My character is a VA, and I have 4 ship slots open at the moment.
I made a test purchase of a single Master Key, and that worked. I can't think of any reason why my purchase of the Andorian ships is failing.