I had Mach3 for years, then went 5 blade for a while, I think the razor even vibrated. Then one day, after the economic downturn started, I actually took notice of how much the blades were. I think it was about €22 for 3 or 4 blades!
These days, I have a Lidl two blade razor, that cost about a fiver and comes with about 20 spare blades. My shaving foam is about 80c for a huge thing of it. I shave every day, in the shower. Perfect, close, smooth shave.
I do spend money on aftershave though - a nice one like Issey Miyake for about €60 that lasts the guts of a year.