A 9-year-old Prius doesn't have 7+ years left in it. Even if it were a regular car, it likely wouldn't, but hybrids have a markedly shorter lifespan. You will be paying on that car long after it's in the junk yard.
Also, the grand total of all those payments is over $23,000. Signing up to pay $23,000 for a 9-year-old Prius is absolutely nuts. The MSRP of that Prius when it was brand new was only $23,000, so you're going to pay that now 9 years on? Only a fool would do that.
Actually, come to think of it, that car's 10 years old, not 9, because 2010s were all manufactured in 2009 and most were actually sold in 2009, having come out in the May 2009.