tbh Moly I do have some sympathy as I believe it is usually cheaper/better to repair something you know than to buy something new, but now and again it is better just to get rid.
At least I took my own advice today.
Looking for a new car for Mrs b r and we went and test-drove the one she fancies. While away they put her car in the workshop for a quick check to get a p/x price. When we got back the Saleman asked whether we knew of anything wrong with it. Yep, it's making odd noises that we (and our local garage) can't trace.
Torque-converter is on its way out...
So a deal was done and I reckon its cost us an extra £500 over a 'possible' deal we could've got if our p/x had been trouble-free (for year). Plus the MOT (£50 plus any fixes) and tax (£450!) were due next month - so quits really.
Current car bought new and run for 7 years and 110k, so as long as she keeps this as long it'll be fine.