Stopped at Best Buy last night and picked up a bunch of clearance items. Looks like these are online and in store as well.
6.99 5.99 Nyko PowerPak+ Gaming Console Battery Grip (for 3DS non-XL only, found this for 2.99 in store)
19.99 6.99 Power A Mini Transporter for Nintendo DS, DS Lite, DSi and 3DS (officially licensed)
34.99 5.99 BD&A - Wii U Gaming Essentials Kit (comes in blue, pink, or black and includes a silicone GamePad skin, 2 replacement styluses, screen cleaner, a GamePad zippered case w/handle, officially licensed)
19.99 4.99 PowerA - GlowFX Stylus (for Wii U or any DS system, officially licensed)
YMMV in store clearance items:
9.99 5.99 Rocketfish™ - Pro Stylus and Screen Armor Kit for Nintendo 3DS and 3DS XL (B&M ONLY)
??? 4.99 Rocketfish Universal Headset Stand RF-GUV1203 (couldn't find the link for this online [SKU 3526165])