• Update
  The 400 GB card is temporarily out of stock on Amazon, though you can still order it for deferred delivery. We also found it on Newegg for the same

Flash storage prices are usually on a downward trajectory, so if you don't need something immediately, it makes sense waiting for a better deal down the line. Sometimes though, we see prices that don't look like they'll come back soon, like in today's sale on SanDisk Ultra microSD cards — with 400GB available for $62 and 200GB for $29.