Burr coffee grinders can be considered expensive depending on one's budget. Capresso's burr grinders cost between about $50 and $150, while its blade grinders cost about $25.
The quality of a grinder is determined by how well it crushes coffee beans. Blade grinders tend to crush beans unevenly, affecting the brewing process. Burr grinders are more consistent.
There are two types of burr grinders: wheel and conical. Wheel burr grinders are fast but loud. Conical burr grinders are not as quick, but they are considered the most efficient. They are also less likely to clog when using oily coffee beans.