Yes. They have a listing that shows a $16 price. But several reviews complained about blades that were not genuine. One reviewer sounded like an experienced wet shaver who had used GSBs before and found many "duds". There are several reviews where the buyers received Platinums instead of SBs. The seller is not Amazon. They are just a fulfiller. I wouldn't buy those. Reputable sellers like West Coast Shaving, Maggards and others are selling them for north of $30 for 100. That is insane. When I bought my first 100 pack of GSBs I think I paid around $18 or so. Before I pull the trigger on any blade purchases of Polsilver SIs or GSBs, I will fully research the seller. I normally do this but now my radar is especially heightened because of having read somewhere that the GSBs were being discontinued. Lots lf shady sellers out there. Research is your friend.
The shave vendors always charge more for blades than eBay and Amazon. Look at the prices at WCS for their other PPI and Gillette India blades. You think you can't scare up 100 Gillette Platinums for less than $46 or 100 Astras for less than $18? The damn things are everywhere for half that or less and there is certainly no danger of them being discontinued. Same with GSBs. Genuine blades on eBay are still available from several vendors as I write this for under $16 per 100.
Now maybe PPI hasn't run GSBs in awhile but that doesn't mean the sales channels aren't awash in them. Stocks peter out slowly. When they're getting hard to find (like the red box Gillette Stainless have) then you can figure they're going away forever. None of these are hard to find. Apparently it's pretty easy to find people willing to panic buy, though.