Hard to tell from these pictures, especially if there are any corrosion issues, but looks like its worth taking a look at and asking price seems fair if it is solid, and allows plenty of margin if something breaks in my opinion. No mention of MOT due date that I could see, so that would be my first question. I personally would not buy a car without a very recent MOT, or a pre-MOT - sometimes the seller is happy to have someone interested and are confident enough in the car to do it...
As always, check the oil and coolant from cold to look for mixing issues, make sure 'you' start it from cold, take it for a run and get it hot, make sure it idles and doesn't overheat (fan should kick in). See if it brakes smoothly and stops. Try every switch to find out what doesn't work. Start it from hot. Take a weak magnet e.g. fridge magnet and run it along the sills to look for signs of thick filler. Look inside the wheel arches, sills and underside for signs of repair or corrosion, broken underseal. Check every inch of paint to looks for signs of corrosion. Look at the state of the brake discs, pads, and tyres.
Make a checklist like this and check off everything on it because you might just fall in love and lose your ability to be objective... (wish I'd done that). Factors these issues into your bartering...
That's a start - other people on here might suggest other checks...
