Topaz Stainless Double Edge Safety Razor Blades, 5 blades
Find a bulk package of 100 blades here.
I just recently bought these. Initially I was doubtful of their performance due to the low price, but they really do shave quite nicely! They are a mild shave, so several passes may be needed depending on your own hair type. For me, I trimmed about three day beard growth, and have thicker Caucasian hair. I would highly recommend these for anyone looking for a mild blade that is cheap enough to use only once.