First I will like to say, this is an amazing server, I just don't play it very much anymore.
So in the voteshop is a +1000 claim blocks item. It costs 32 ancient iron. I have bought it, and then used it and it got rid of the item and said "You do not have access to this command, please contact the admins if you think this is a mistake." Just to let you know this item needs to be fixed. I expect the +$1000 would have the same bug but I have not tested it out.