Bestbuy offers LG - 8x External USB Double-Layer DVD±RW/CD-RW Drive - Black for $17.99 (orig. $39.99) with free shipping.

Product Description:
Store and play files on disk with this portable LG external DVD writer. Its 8x DVD and 24x CD write speeds let you produce optical copies efficiently, and its silent play technology optimizes read speed while reducing noise. This slim LG external DVD writer supports M-DISC formats for high-quality data storage. 

• Multiformat support
  For DVD+R/R DL/RW, DVD-R/R DL/RW, DVD-RAM, DVD-ROM, DVD-ROM DL, CD-R/RW/ROM and CD-DA media.
• Silent Play
  Offers optimal noise reduction (CD-DA ,Video-CD, DVD-Video).
• Jamless Play
  Reduces interruptions for smooth playback.
• 6x maximum DVD±R DL write speeds and 8x maximum DVD±R write speeds
  For rapid disc creation.
• 8x maximum DVD-ROM SL/DL read speeds
  Ensure fast operation.
• 5x maximum DVD-RAM write speed
  For fast disc burning.
• Quick writing and rewriting
  24x maximum CD-RW write speeds for fast disc burning.
• 24x maximum CD-ROM read speed
  For fast operation.
• 0.75MB cache buffer and underrun prevention function
  Help eliminate errors for smooth disc burns.
• USB interface
  Delivers rapid data transfer and wide compatibility with PC systems.
• 160 ms average for DVD and 140 ms for CD access time
  To help you complete your tasks quickly.