I used to get 10 shaves from disposable twin blade razors using bar soap. I did one pass plus touch ups. I think the cost of a 10 pack of razors was around $6. So, doing that math, that's 100 shaves for $6. Can't really count the cost of the soap because I used so little. I didn't need to use aftershave because the soap I used already contained glycerin. I did this for several years with (what I thought at the time) was a fine shave. Definitely much better than using an electric.
Today, I use one DE blade about 3 times before I toss it. The blades I use are about $18 per 100. So, 300 shaves for $18 or 100 shaves for $6. Costs exactly the same. Now with DE, I use expensive creams and soaps but I get a much better shave. I could easily switch back to my bar soap with good results (I've lathered my bar soap and it works just fine).
So for me, if I weren't using expensive creams and aftershaves, it would be a wash. Of course, I'm spending much more on DE shaving (trying everything available out there).
Today, I use one DE blade about 3 times before I toss it. The blades I use are about $18 per 100. So, 300 shaves for $18 or 100 shaves for $6. Costs exactly the same. Now with DE, I use expensive creams and soaps but I get a much better shave. I could easily switch back to my bar soap with good results (I've lathered my bar soap and it works just fine).
So for me, if I weren't using expensive creams and aftershaves, it would be a wash. Of course, I'm spending much more on DE shaving (trying everything available out there).