Rear brake shoe hydraulic cylinders (both sides)that set me back £10 each, easy to install though. Also slightly rusty.
I bought this car from a lady at work after a unfortunate accident with my previous car. She was under the impression that the automatic transmission would "go" after 48,000 to 52,000. I paid £200 for it. I was told by a mechanic friend that if the engine oil and filter was changed regularly i.e. 4000 to 5000 miles (transmission uses the same oil as the engine) it would last "forever". I've followed this advice and it's still going! There is a slight slip from 3rd to 4th but it's done this ever since I've had it and doesn't seem to have got worse. I think the engine and transmission will no doubt outlast the bodywork. This has been a great investment (you can't go wrong for £200!) I was fortunate to get a low mileage 2 women owners one. I keep saying I'm going to get a new car but it's still going so I see no point other then for vanity reasons.
I got a 1.3 automatic for £40, it slips sometimes between 3rd and 4th, but it goes well. Tyres are expensive.
I got hold of a 1litre for a £5, I've owned it for 3 years and its never gone wrong. metros are the way forward.