RCBS Small Base Sizer Die For 308/307

I bought a set of these dies a few months ago. I have tested them trying to bring back within spec a bunch of range-collected brass i got in a deal. I ran thru approximately 50 pieces of brass and about 30 were bought back to spec. I'm using a Hornady case gauge to determine "spec". I have not ran a large batch of brass thru yet. At the time of this review, the listed price for these dies is $44.48, New, clearly indicated on the webpage. I paid about half that. I do not recall seeing the words "used" in the ad, and there's no evident visual indications that the dies were used. The box on the other hand is a little beat up with one of the "hinges" torn. I cannot complain given the price. They are serving the purpose i set for them. I did notice that not all the brass is being brought back to spec, and hopefully, that is expected given the history of the brass.