by definition, half of people pay less than the average.
I hate to be nitpicky, but that's not what the average is. In averages a small population of people who spend way more can bring averages above the median (which is the split between halves of the population).
For cars in particular I prefer using medians as they are much more likely to be aligned to what most people experience.

With how many experienced people were in that group, surly they should have known that's exactly when avalanches are extremely dangerous ?