I don't think the ZC issue is permanent. Either it will become tradable again with the expectation to remove it soon after, or it will be removed completely and players will be reimburced - granted, probably not very well, nor should they really be reimburced well anyways. Or they might just plan on adding a new set of items in the ZC shop with severely overpriced tags in order to drain the economy. Anyways, I don't think the ZC issue is permanent. Something's going to happen in the future with them.
As for trading prices, I think it's a good idea to make you pay a fairly substantial amount in order to even rent a table. That gets rid of people hogging tables for no reason, and it actually allows them to make VIP more useful by offering discounts that may be worth it for those who trade a lot.