With availability very limited by ZIP code, and for in-store pickup only, Best Buy offers a selection of Dynex Cables and Charges, with prices starting at $1.99. A couple of best bets:
Dynex MFi-Certified 3-Foot Lightning-to-USB Cable for $1.99 (pictured, $6 off)
Dynex 2,000mAh Portable Battery Charger for $1.99 ($6 off)
Most taxpayers will see their tax bill go down during 2018. That could impact which type of account -- traditional or Roth -- makes sense for you.