Not to sound like a Zavvi champion but they have improved a lot from the early, rather poor, boxes. We got a pop vinyl last month and this month the T-shirt is a work of art (by the same artist who did the Fifth Element and Wicker Man steelbooks, incidentally). YMMV, value is hard to discern, very subjective really.
I wouldn't even go that far mate, never bought one before but having seen the one before with the dancing Groot I was hoping for a funko figure at least but no thought it was utter crap and won't be buying another one