Another thanks to the OP...
Traded-in my iPhone 5S, iPhone 4S, and iPad 4. Used the bonus $50 coupon, as well as 10% Change-of-Address coupon. No accessories nor boxes required, just devices themselves, got exactly the amount for trade-ins that was shown on Best Buy website.
iPad Air 2 Gold 128GB: $699.99
$50 Trade-In Bonus Coupon: $649.99
-10% Moving Coupon: $584.99
+Tax @ 6%: $620.09
-$300 iPhone 5S Trade-In: $320.09
-$243 iPad 4 Trade-In: $77.09
-$110 iPhone 4S Trade-In: ($32.91)
For a couple old devices and my current 32GB iPad and I get a new, high storage iPad Air 2 for $0 with a $32.91 Best Buy Gift Card. Added benefit of not having to sell on eBay or meeting someone on CL.
Funny thing is I went to a different area store first and they wouldn't honor the 10% coupon and offered me $135 for my 16GB Gold 5S due to a minor ding in the corner.
Decided to try another Best Buy near my destination and they had no problem doing exactly the above-mentioned transaction. Nice staff and very helpful, much unlike staff at my first attempt which didn't want to help me out on the coupon or trade-in value, and actually said 10% coupon strictly restricted use on Apple products.
Feel like I should mention both Best Buys by name/location here since they were such starkly different experiences...
Anyway, thanks to everyone who mentioned this deal / details before me. Unfortunately stuck waiting until 11/4 for the one I wanted to be in stock at the location I purchased from but for the price I can't ask for more.