Well, I hope all is well. Private sellers with auctions are sort of what you want to stay away from, IMHO, on ebay, the best thing to find (if you must) is um, legitimate stores which may be backed from the manufacturer and whatnot.
For one, (I hope you checked your authenticity card) but if someone is making money on the side by buying in bulk for less and selling off the mods they don't want to pay for it, well that is reselling and will often void the warranty. Etc.
Convincing fakes are and do get made and sold on Ebay, also. It's just something that happens.
There are a lot of good reasons for buying from a legitimate vape shop even if it's a few dollars more, and without the convenience of fast shipping. Even with seller feedback, it's not always a hundred percent, even if you "got lucky" this time. Sorta. I mean, your mod arrived scratched up and I don't own a blade but my Geekvape stuff does usually have a screen protector. It could have been a manufacturing "oops" but I would do two things: a) contact Geekvape_Official they are usually pretty helpful and b) do enough research next time using whatever online tools work for you in order to obtain your mod from what you are certain is a legitimate vendor. Does it avoid any and all headaches? No, it doesn't but it does at least offer you some protections like a warranty if something goes wrong.
Good luck with it and I hope you enjoy it.
Anna