Like a number of others I want to give an SE a whirl but don't want to immediately buy a big batch of blades. A number of folks recommend the Ted Pella ones that are PTFE coated, but they require a big order and I'm told that shipping is expensive. I just noted that American Safety Razor (Personna) makes a PTFE SE blade that is available on Amazon in a 25 pack for $6.75 or $18.95 for a hundred. Has anyone tried these?