There a few things to consider when looking at buying a new jet ski. You first need to figure out how you will be transporting it, and if you need a trailer or not. Second you need to determine where you will store it, for both summer and winter. Finally when looking at jet skis you need to consider affordability. New jet skis cost between $10,000-$15,000. Older jet skis cost between $1,000-$8,000.