for what its worth, those expected dates at towerhobbies are usually way off. I e seen them go from Early June to Late June and then all the sudden in stock in late May. I've also seen the dates keep being pushed back for months on end, for example the Prova Impreza, which finally just recently came back in stock.
it seems as though no-one really knows for sure when they will physically be in stock.
it kinda seems as though HPI employees just show up one day and randomly make a bunch of bodies then kinda surprise suppliers with them. at least that how it seems, anyways.
you could list them for $60, then the next day, without warning they are back in stock and no-one will pay above retail.