Many Switch accessories previously sold out are available at Best Buy.com right now. Like pro controller, charging grip, red/blue joy-con, etc. Just ordered a charging grip myself.
Like title stated. Weird. Never seen Amazon do $10 discount to 3DS pre-orders before. Pre-order now. You can always cancel later if you change your mind.
Doesn't allow me to post link since this is my first post. Check Amazon yourself if you are interested.