Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey guys,

i've a question about transferring gold from an account horde to an alliance account via the neutral auction house (i know, i loose 10% or 15% don't remember).

it this allowed/safe ?
same question about items (bags principally).

thanks

ps : golds are legits (i you may ask)
sorry for the basic english ; non native speaker here and if the question was already stated^^