I ordered 57 packages of the $1 more.com Mach III deal the very first week it was offered. I never would have done such a thing, but the customer service rep that I spoke to encouraged me to do it. She said I should make sure only that I tell everyone I knew about the great deal. I did. Nobody else signed up though. Then more.com went out of business. I still have 55 left packages left. Oh well.
I got the actual razor for free too, when PlanetRX offered that $10 of $10 deal. Before that, I used to shave with those stupid $1.19 generic disposible blades from the B&M drugstore. Only I kept them around for like a month. That's a deal that actually made a significant improvement on my life.
One interesting thing about Walmart. Was looking at the replacement blades a while back and it was actually cheaper at the time to buy multiple 4-packs than spring for an 8 or higher pack. Crazy. Just checked their website and it'll now save you a couple bucks to get an 8 or 12 pack.
I've thought about mixing up the proper oils and such to mimic the goop you can buy that keeps the blades from rusting. As it is, buying the stuff wouldn't really save any money, just save swapping the razor every 6-10 shaves. If I get the right mix I'll post it.
One thing I sometimes forget is that I'll be paying around 8% sales tax if I buy locally.
The post above this one mentioning Sam's Club reminds me. If you picked up (or plan to pick up) any Walmart.com gift cards, you can use them at Sam's club to effectively get an additional 20% off (excluding sales tax).
there is a product called "Razorguard" that allegedly extends the life of disposable/refillable razors... you soak you blades in it between use... I got a sample and it seemed to work but I never pursued purchasing it...razorguard website