Got it. Some like to strap their bags in and some don't. My feeling is that seat belts don't always secure things the way we hope they will but if it makes you feel better to do so and has proved positive in the past then by all means do so!I see nothing wrong with strapping anything in with a seat belt. I have even done so with various things I may be taking places. It has nothing to do with what the item may cost, but more about not having to worry if you have to slam your brakes because a deer jumps in front of you and you don't want stuff flying around the car.
Do what works for you.