Its not unusual for dealers to want to try an establish a deal before you take the car out. Your not confirming to buy it but they are trying to see if your serious otherwise they just spend all day with people trying out their cars just to get to drive one.
Can you imagine how annoying it is when every tom dick or harry takes your car out and then just says ` i`ll think about it` and walks off.
No one likes tyres kickers on a private sale so why should the trade put up with them either.
It doesn`t mean they wont let you take the car out thee are just trying to judge how serious you are.