They are good if you get the legitimate ones. Plenty of fake Superthins around, mostly in yellow packaging from Thailand in what I have seen. I have a few tucks of the older packaging.
Looking at the packs they don't show the cracking or peeling on the corners of the boxes, so they are likely legit in my book.
Please also remember, you are in Nepal. It is a 3rd-world country, and while you may think you are doing them a favour by buying them out of these blades, you may do them a disservice as it may take some time to get new stock in. Locals will buy a pack at a time, not a tuck. Please do business with them if you wish, but be considerate of where you are and how your actions may affect others.