Is this an ebay scam?

So yesterday at about 7pm i ordered one of those chinese io hawk scooters(not the real one) from a us seller, because im in the us and i didnt want to wait 1 month to get it, so whe i was ordering it, it was 7pm august 29th, and it said estimated delivery september 3-11, and so this morning (august 30) i asked the seller when he will be shipping out my order, because its for a birthday present, and he said t will definately be shipped out today (aug 30) but its not almost 11pm, and my item isnt shipped out and im starting to get a bit worried, because in my ebay summary it says that the estimated delivery date is august 4th but im starting to get a bit worried cause i already payed and my item isnt shipped out yet, the worst thing is that this seller doesnt have any feedback, i just seen that he sold 5 of these scooters and 6 people ordered them the same day i did so, should i wait another day, or should i message and ask again, because i need this to be delivered before next week, Thanks