~$300. Are there any other cheaper ratcheting seatbelts out there?

There are some things in this world that you just should not be judged only on
price.

Among these are your:

Personal defense pistol
Body armor
Parachute
Fire extinguisher
Lasix surgeon
Climbing rope..............

Your safety restraint system is in the same class. When you need it and it
fails you really wish you had bought the better one - at least for a few
seconds. While anything is better than nothing sometimes there is no
substitute for the best.