May I ask why you decided to go with Newegg to preorder the unlocked V20? I'm debating between the Pixel XL and the V20 right now and I looked into the return policies for both Newegg and B&H. I contacted Newegg Live Chat, and the rep said that the V20 unlocked is non refundable. He said you can only exchange for a replacement within 30 days. So if you don't like it at all and don't want it, I think you would be out of luck trying to return it.
B&H seemed to have the better return policy (or at least they allow returns), according to their phone rep and Live Chat.
I wanted to research the return policies in full before deciding who to order from. I've never bought from either before, so if there is a benefit to ordering from Newegg, I would definitely like to hear about it.