go to motorscooterguide,net, has nice writeup on almost all scooters, including Kymco People 50. these are great scooters IMO, I had 2005 People 50. 2003, if in good condition, should be a good one. The early years, 2003 thru 2005 had less emission mods (exhaust pipe was better especially), so run better than years alter 2005 generally.
I like Heidenau tires, a new set really improved the ride, performance of my People 50.
I think $800 is a little high, but depends on where you are and the other available scooters, so maybe a good price in your area? Good luck!