I just buy the blades at JoAnn's. I try and get them in the multipacks and when on sale or when I have a coupon. Have a good supply now and haven't bought any for a while. Seems to be the most economical way to buy them, still pricey, and the often have the mulitpack ones locked up so have to ask. Depressing to think that sewer's will shoplift but they have had a big problem with the blades walking off.