Re: v6 engine stopped
Its debatable whether its an economic proposition to repair, unless its in particularly good condition otherwise. You will not see change from £1000, and probably quite a bit more.
This is the tragedy of the Alfa V6 and why I hate cam belts so much.
You won't know the extent of the damage until the heads are off..by which time you have spent £300. Then, not only do you have to replace the broken bits, but any others that are worn or past their best. The parts bill mounts frighteningly. It may need a radiator for example if the old one is the original.
If you buy a used engine, then you must do the cam belt /tensioner/water pump anyway, so its still not cheap by a long shot.
Your choices are a bit grim I'm sorry to say.
1) Either sell the car to a breaker or break it yourself for parts. This is the most painful initially, but is a 'quick' solution
2) Fix the car at a cost which will be quite a big hit financially.
The only good bit about option 2 is that you should end up with a very nice car in good mechanical order which you can enjoy. As the vehicle value is so low you have to run it for a year or two, Whilst that is not a hardship, you will have further running expenses.
Sorry to be a bit gloomy, but its a real bummer when this happens.