Adata via Rakuten offers its Adata Ultimate SU800 3D NAND 2.5" Serial ATA 6Gb/s Internal SSD in several sizes from $19.54, as listed via the coupons below. Plus, these orders receive free shipping. That makes each the best price we've seen. The sizes:
  • 128GB for $19.54 via "SAVE15" ($22 low)
  • 256GB for $30.59 via "SAVE15" ($16 low)
  • 512GB for $48.44 via "SAVE15" ($45 low)
  • 1TB for $89.24 via "ADA15" ($31 low)
  • 2TB for $181.04 via "ADA15" ($34 low)