My orbital blade sharpener works great! I haven't had to buy blades in ages!
BUT when I do buy blades I get them in bulk from this site!
http://webmail.aol.com/29970-133/aol-1/en-us/Suite.aspx
You can register for his weekly sale letter! I've bought several things, over the last couple years, feel I have saved money and the service is very good!
No, I am in no way affiliated with this company!