Nowadays, razors cost a fortune.... Don Imus, radio personality uses a new razor every day to get a close shave.... To shave my legs, I am not that extravagant... But, I use about 1 a week.
Here is a quick, easy way to prolong the life of a razor.
After using the razor, rinse it off well and then immediately and CAREFULLY dry the blades thoroughly. Place the razor in a (safe) and dry space, so it is not sitting in water and not constantly getting moist by shower steam.... One way to do this is to wrap it in a dry towel, store it in a drawer or cupboard. This will increase the razor lifespan, the sharpness of the blades for much longer.