It might be worth considering that if Gamestop happens to be getting stock, other retailers might also be getting stock. Although, has there been any word on when this stock will be available?
Also, as an aside, I dislike how Best Buy changes your return window based upon some silly membership status. Essentially, if you spend more money in Best Buy throughout the year, they upgrade your membership status for the next year. To get a 45-day return window, you need to be one of their Elite Plus members, which requires spending something like $4500 over the course of a year. I got the Elite Plus after buying a TV from them, but this year, I'm an Elite member, which only gives you a 30-day return window.
Eh, I just don't think it's right to do. Ultimately, my qualm boils down to the fact that a scalper is removing available stock that could have been purchased by someone looking to actually own the item. (Whether they wanted it for themselves or for a gift is irrelevant there.) In other words, you aren't really doing anyone a favor in that case, you're helping to cause a problem for which you're then trying to sell an overpriced solution.
On the flip side, if you wanted to offer a service to wait in line to purchase someone a console, I think that's absolutely fine. Using the same wording as before, you are doing someone a favor. Although, that does provide an interesting conundrum... using what I said, would it then be wrong to wait in line for a console and flip it? It could be argued that you're simply finding a buyer post-purchase rather than pre-purchase. However, what about actual users that simply got to line a bit later that would have actually used it?
Another interesting side question would be reselling goods that are simply worth more now. For example, I sold my Oppo UHD player after Oppo ceased production, which caused the price to skyrocket to over 200% the original cost. I had purchased the unit well before they shutdown production, and I used it as one normally would. However, it was hard to ignore how I could easily sell the unit, and purchase a Panasonic UHD player that also supported automatic Dolby Vision switching (it's a surprisingly rare feature -- Sony's offerings require manual switching). Is it wrong of me to take advantage of the scarcity of the devices? I even purchased the Panasonic player from Best Buy as open-box, which had a a nice discount (~20% off)!