Hi, I'm from Argentina, I'm about to buy the ACER R3-471T-76BM. Prices over here are way expensive than the US, neverthless this particular laptop is pretty cheap and I "smell" that the seller may be hidding the fact that it's a refurbished laptop. How can I tell if the item is refurbished or not? What should I know to tell apart a refurbished ACER vs a new one? Thanks in advance!