Bestbuy offers SanDisk - Extreme PLUS 128GB SDXC UHS-I Memory Card for $19.99 (orig. $21.99) with free shipping.

Product Description:
Equip your camera with this SanDisk SDSDXWA-128G-ANCIN Extreme PLUS UHS-1 memory card. The shockproof and weather-resistant build is ideal for outdoor adventures, while write speeds of up to 90MB/sec. allow smooth 4K video recording. Featuring a 128GB capacity, this SanDisk Extreme PLUS UHS-1 memory card holds large files, and read speeds of up to 190MB/sec. deliver fast performance.

• Compatible with most devices that support SDXC cards
  Offers wide-ranging use.
• Improve your workflow efficiency
  With SanDisk QuickFlow technology, this card optimizes performance for time-saving media off-loads.
• Rugged construction
  Built to withstand weather, water, shocks, and other less-than-ideal conditions so you can rest assured that it's good to go wherever your work takes you.
• 128GB storage capacity
  Provides plenty of space for your photos, videos, documents, and other data.
• Up to 190MB/sec. read speed, up to 90MB/sec. write speed
  With shot speeds of up to 90MB/sec. and UHS Speed Class 3 (U3) recording, you're ready to capture high-resolution, stutter-free 4K UHD video.