Don't do it. It's more cost effective to keep your current vehicle.
It's a dumb idea to go for a vehicle that you already know all of its current maintenance history/reliability to a vehicle that's 15 yrs with question marks everywhere. You won't know if it's accidental, meter reversed or if the battery and engine and such are truly 100% which is HIGHLY doubted.
You don't know what kind of engine oil they used, what viscosity they used, what change interval they used, how often they changed their air filter, whether they changed the engine coolant, whether brake fluid service has been done, spark plugs?
If you have a complete maintenance history with confirmation that the vehicle is mechanically sound AND you're getting a good deal, then you can think about it. But imo, switching from a newer vehicle to an older vehicle is not a good choice. I did it with our 2014 vezel to a 2006 shogun, only because the vezel was terrible and a reliability nightmare in our ownership.
