My last 100 of these from Amazon, on 5 September 2022, cost me US$11.00. I've tried maybe 25 DE blade models so far, and these continue to set the standard against which all other blades are judged. Smooth, sharp, long-lasting, and unfailingly excellent, they would still be a good value to me at $20 for 100.
I’m glad I took advantage of some sales over the years. Especially important considering I’m a daily one and done head shaver.
I know the price can fluctuate depending on the vendor and such, $11 for 100 seems a good price for them. I also agree about Bics being one of the best blades out there. I've used them almost exclusively for DE shaving after my initial sampler pack I bought when I first go into wet shaving.