In the old days, if you go to the barber's shop, you will most probably see a straight razor. Due to the worries about AIDS and other diseases, the barber stopped using straight razors and started using disposable razors.
But I think straight razors are cool weapons due to the sharpness of it. Just go see the matrix reloaded where the twins uses straight razors as weapon. And think Sweeney Todd :P
Now, people don't use it anymore. Most being sold are just for collections. And its very expensive. This model below is overUSD100.
Wish I can have one. Just for collection.