If I use a blade 2 times and they cost me around $12 per hundred I am only spending $18 a year on blades . or $1.50 per month...why the frugalness?!!
What blades are you buying at that price?
I usually use blades a lot longer than I should. Lately I've been trying to replace them more frequently and I think my shaves have benefited from it.
I like the idea of using dice to count shaves @dfoulk.