However, Mirror Universe ships are selling for around 150 or 200k ECs, and that equates to some pretty cheap storage. I now have junked some older ships and replaces with the new ones for extra storage, as well as trying out different ship types.
It's cheaper than Zen for bank spots - a big drawback though is the items will then be bound to you, so not good if you want to put it on the exchange.
Just thought I'd share - pretty certain many people are already doing this, but for those that hadn't thought of it. A couple of episodes will give you enough ECs, so it's not hard really.