A few weeks ago on the HLN (Headline News) channel, they had on the consumer tips guy, Clark Howard. He said that you could make a pack of razors last 6 months simply by drying them off after each use. Apparently the water corrodes the finish which works to dull the blade.
So... I wanted to try this. Razors are way too expensive in my opinion, anyway.
I have an average beard thickness and typically replace my razor once per week. I know it needs replacing when I start to get nicks and cuts.
I found that my razor lasted about twice as long, before needing replacing. It's easy enough to dry off the blade with a towel after shaving. I won't get 6 months from one pack of razors, but Clark just shaved my annual razor costs by 50% - thanks Clark.