GeekDeal via eBay offers the Solidoodle 4 Desktop 3D Printer, model no. SD-3DP-4, for $679.99 with free shipping. That's the lowest total price we could find by $19. The printer allows you to create plastic parts up to 8x8x8", with a resolution up to 0.1mm.
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.