The easiest, simplest way to shop for a casket is to purchase one from the funeral home or cemetery.
However, it is typically ideal to shop around, at least a little. You can check other local funeral homes and compare prices, and even purchase a casket from a different funeral home than the one that is helping you. (But note: there may be transportation fees that wipe out any savings.)
Lastly, you can order many caskets online. The ones you find on the internet can often be less expensive, but they may be of lower quality as well.
Read more: Cheap Caskets: 5 Ways to Get an Inexpensive Casket