FYI, sale price is still listed as available. When I add the $6 shipping, they are more than the 10 pack available through Amazon or WalMart. If I was adding something to make it enough to get free shipping, it would be worth it - but I'm not going to cave in and do that, lol!
A couple of weeks ago, I changed my blade and the row of pieces that I took off got jostled. Since they were no longer in order, I looked up how to replace the Olfa blades. I watched 3 videos, each different! The first one made me question if I'd been doing it wrong all along, so I tried it. Nope, it definitely did not work for a regular blade. I did find, however, that the thin little washer thing really does make a difference depending on whether it curves up or curves down. I didn't know that before, and found that the curve going up makes it cut so much nicer!