Got these before my wife physically dragged me out of the venue to prevent me from buying any more ;)
Group pic above, and here are indiividual shots, filenames are the name of each plant:
The last two photos are both mammilarias - kinda neat how varied they can get within the same genus :)
It might be mislabeled of course, but that's what it was sold so me as, and the seller seemed pretty professional.
The spines on both tephrocacti are pretty thin and flexible - you can easily bend them with your fingers. I do love the variation with curly spines - haven't seen one irl until today, so got it on the spot :)