My personal opinion is that if you have a course beard is to not start with a full hollow blade like a Bismark.
The size and shape are great.
Start with a quarter hollow, round point and 5/8 to 6/8.

I started out with a Bismark and hated the shave, then I bought a quarter hollow and it shaves me smooth in two passes. The Bismark takes me more passes 4-5. To get the same results as a quarter.
Check out the Classifieds up at the top and buy a cheaper blade. You'll spend less just incase the type of blade doesn't suite your beard or shaving style.
Spend the rest on a great soap and strop. Just my two cents, that now costs more to make than it's worth.