Ten Derby Extra double edge razor blades

Description

I've bought 500 of these blades and am selling them at a slight loss. They will be mailed in a first class letter. First class letters do not offer tracking and delivery estimates. If you are not comfortable with receiving first class letters, please do not buy these blades.
The blades are good, though not extremely sharp, but they last me 5-7 days each. They compare with blades from Korea and Egypt, but are not as sharp as blades from Russia or Japan.
Happy shaving!