Weird I know, but I thought if you could put a sharp edge back on a straight razor, why couldn't you re-sharpen a DE razor blade with a strop? I could be possible, right? Just run the blade lightly over the leather strop to put a new edge on the razor blade. I know DE safety razor blades are supossed to be chucked after use, but if you could sharpen one DE blade edge a 100 times with a strop before chucking it out, imagin that would work out to a fraction of a cent for each shave, basicaly a box of 200 Derby's would last you a lifetime.