I've never let anyone test drive a car I'm selling . Just not worth the hassle . If its a good genuine car that's been looked after as well as being priced fairly then it will sell . I would put it on autotrader if I were you .
I paid 10.5 for my 08 night blue with 25k on a year ago . I think I got a bargain to be honest , as said I would have thought yours with 65k on would sell at around 9-9.5
What did you pay for it 6 months ago?