I bought a 2009Accent several years ago for $300. Engine was trashed and it was wrecked in the left front. I transferred the title, paying the tax on the $300. Several months later I get a letter from the state of FL stating the sale price was less than the average value of the vehicle. They wanted signed letters from the seller and the buyer that the stated sale price was correct. Well I couldn't do that since the sale was facilitated through a third party, a service advisor that no longer worked at the dealership so I had no way to contact the seller since I didn't have their contact info. I called the FL DMV and explained the situation and why the car was so cheap. They told me to just send a letter explaining the cars condition and how I bought it. No problems after that.
Not every state is corrupt.