So I ordered a Series 4 watch on October 15th, and it's not due to deliver to me until sometime around Nov 12th. Kinda sucks. Anyway, armed with proof of my order, I took my Series 3 watch into my local Apple store with the intention of selling it back to them for $150 credit (current value) towards my Series 4 purchase. I just figured since I already purchased the Series 4 watch, they'd go ahead and credit $150 back to my credit card. But no. The Apple lady told me they need to see the Series 4 watch and get the serial number off it in order to give me the $150 for my Series 3 watch. Ok, I get that. They're not going to just throw $150 at me without proof that I actually own a Series 4 watch. All good. She did offer to give me a gift card on the spot, but I declined. Told her I'd wait for my Series 4 to get delivered to me and then I'd come back and get the $150 credit towards the $460 I've already spent on the watch. That is, if the GiveBack amount is still $150 in two weeks. Might be less. Seems to be going down every couple of weeks. So that got me thinking... My local Best Buy has Series 4 watches in stock right now. If I buy one from them and take it into the Apple store and use the serial number off that watch, will that qualify me for the Apple GiveBack program and the $150 credit I've got coming for my Series 3 watch? Or do I have to buy the watch directly from Apple in order to qualify for the GiveBack credit? Anyone been in this situation before?