We have a referral program called The 12 for 12 Club.
Refer 12 people in a 12 month time period and we will hand over your title. For every 3 customers that mention your name at the time of purchase, we will take $100 off their car payment. For the next 3, we will take off $125, the next 3 it will be $150, the next 3 its $175. Even if they do not reach the full 12 customers, it is still $1,650 in "free car payments".