I recently went on a jihad against the obscene prices for replacement blades for my Gillette mach 3, I didn't shave for a month and apparently, that is a bad look for me. I tried electric but may as well have flushed $95.00 that I spent on my Braun electric shaver down the toilet.
So I bought a Merkur safety razor from amazon along with about a years worth of blade replacements, total investment was about $65.00. Little bit of a learning curve but so far, I'm a happy camper! It's the closest shave that I have ever had, outside of the PI. Replacement blades come 10 to the pack and are only $6.00.