RCMoment offers the DIY TriFidget Spinner in several colors (Blue pictured) for $1.32 with free shipping. That's the lowest price we could find by a buck. It measures 3" x 3".
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily. Also, this product ships from China and may take two to five weeks to arrive.
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.