It's an ex-taxi, so not an easy life. Avoid. As for the pics just click on the profile pic to see what else they're selling. They have another two cars up for sale/sold in last week, so are doing a bit of amateur trading, so have probably just got pics mixed up. They've tried to put a phone number on there too which FB blocks, so my guess would be they're using other half's account to advertise them through. Again, avoid.
I have cars of that price, and it can be a bit of a gamble at times. Use MOT history check online to see what fails are on there. Have a look at the seller too to try and get a feel of how 'dodgy' they look. Avoid driveway traders as they have more of an interest in punting the car on and will have already bought it cheaper.