Is it near spawn? shouldn't a trade center be near spawn ideally...
I'd rather keep it away in a more discreet location. Obviously I'm not saying I don't trust people on the server but there's a lot I don't know, who potentially might not realise what it is.
EDIT: That, and if it's linked up easily enough in the Nether distance won't really be a problem. I really don't care if we make a trading hub at mine or anywhere else, it's just irritating trying to be online at the same person you need to trade with.