No its not, they do it on Autotrader all the time with new cars, its called advertising.
Anyone who is looking for a $1500 vehicle is a potential customer. They have limited means and possible are not financially savvy. So why buy an older car for $1,500 when you get get into a nice shiny late model one for $1,500 today! With only $100 a week coming out of your paycheck! Your FICO is below 500? No problem, we approve everyone!
Find a way to give people what they want, and make them pay you for it. This is why Rent A Centers, pawn shops, and check cashing places are in low income areas. They provide financial services to the unbanked.