Top 20 Fun Cars under $20,000 MG Staff April 10, 2021 7. Infiniti G37 X -$13000 Infiniti G37 is another great car for budget minded people who are looking for performance and a fun car to own. A 2009 model will stretch your budget to $13000 on the used market place. Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21Next Tweet Pin It