Robo:

Hmmm, well I may be I victim of haste, Moore's Law and SanDisk marketing. They announced some months ago and I passed on the price back then. Googled again just before I wrote the above but going back and checking the top three links in detail now... looks a bit dodgey. Can't recommend.

The last 'big' ones I bought were SanDisk 200gb Ultra microSDXC UHS-I at the American Walmart chain, in-store, holiday sale around U$50 plus taxes. They're 'too big' for the camera, scanner &c but great for backups.