You can get quite a decent car for £1k, depending on where you look, just don't obviously buy it from a garage. We've got a Dog mobile diesel Citroen Grand Espace 2012, 125,000 we only paid £800 for and we've been all over the place in that without any problem, likewise my 2014 little diesel Ypsilon ( granted which needed a headlight and a bumper when I bought it, took a whole hour and a half to repair) had 5,000 miles and was £1200 last year, again a great little car. How new and low mileage does she want for £1k? Just do your best she is doing you a favour xx