make it batter and add 1 to the v nummber to-do Scarcity (the more shells you take, the less there are to go around, making more people go to you) (DONE) Media (get ads and stuff to make people pay more for shells) Turning your stand into a full-on business
Make a sense of scarcity, people will buy more if you think they're rare you see added scarcity function, but only for money.
