Exactly eek. It's the kind of money where you need it to last a couple of years without major bills at least and if you do get one, it's going to be a hard decision whether to pay up or get rid.
Cheaper and you'd probably let it go to the great scrapyard in the sky without a second thought (although there's the inconvenience of having to find another one), more expensive and it's likely to be worth it as it's more likely to keep going a few more years to make paying for the big repair worthwhile, but in that price bracket, it could equally be the start of the expensive bills and it's not a trivial sum to drop down the drain.
If you can't find anything, and you're financially stable and always likely to need a car, might you look at going the other way and look at a nearly new small car, with the plan to keep it for a long time? A few years ago, I had a PCP on a Skoda citigo for £130 pm with no deposit, which also included servicing and breakdown cover, obviously a warranty, so no repair costs guaranteed for 3 years. The only extra cost was petrol and insurance.
I initially intended to buy it at the end of the PCP, but instead went into my company car scheme, so I handed it back when I'd paid 50% of the total amount so after just over 3 years, I even just made the original tyres last, they were a couple of months prior to needing replacing when I returned it.
So it probably cost less than an older car that I'd have to pay for repairs on and the only way I could have run a car for less would have been to get a much older car and hope I'd be lucky with repairs. But it was completely hassle free and a fairly cheap way to run a car.