Sounds like the OP is being a little harsh to me, for £450 I'd expect it to be sold as spare and repairs.
On 27th May this year I purchase a 2001, red, 147 1.6TS from a garage in Whetherby for the princely sum of £400. It was a vehicle they'd taken in part ex for a local gent there. I believe the garage was called Pristine Cars (Used Cars Hunsingore, Used Car Dealer in Yorkshire | Pristine Cars
As car dealers go I thought they were a thoroughly lovely honest decent couple to deal with (and how often do you say that about second hand car dealers). They were honest about the car, it came with no service history, the bodywork is described as "fair" as it does have a few marks on it and came with just a few days MOT and taxed till the end of July. The car came with no service history at all.
The only two bits of paper I got with the car was the current MOT and the receipt for its purchase.
For good measure the airbag light was on too.
For the purchase price I wasn't expecting anything more, so I think the OP may have been slightly optimistic about getting much more for his money.
Better yet the car I purchased was to be a wedding present for my now wife - we got married on 5th June, so I had the grand total of eight days to get it mechanically straight and at least ready, if not through, its MOT.
So in that time I replaced/worked on (in no particular order):
- brake light switch (was generating error code but brake lights worked)
- entire centre console (the gear / handbrake surround bit - was damaged / manky)
- repaired aircon controls (rotar dial mounts broken)
- replaced cloth with leather interior (thus addressing airbag issue)
- front windscreen wiper mech
- overhauled rear windscreen wiper mech
- replaced power steering pipe (leaking)
- replaced front brake carriers (corrosion)
- replaced front brake calipers (defective / brake imbalance across front axel)
- replaced front brake pads (might as well whilst there)
- replaced front brake discs (worn / corroded)
- replaced brake fluid (well manky!!)
- replaced gear shift lever assy (worn bushes - still needs further work I think)
- replaced gear shift cables (worn)
- replaced gear shift cable link plate, gearbox side (cracked / damaged)
- replaced gear shift link lever arm bushes, gearbox side (worn / damaged)
- replaced radio antenna (missing)
- replaced exhaust gasket (worn)
- replaced all exhaust rubber hangers (perished)
had to do some pretty serious cleaning on her as well. It didn't quite pass it's MOT in time for our wedding but did make it through after (it didn't expire at any point so didn't matter really), it took a couple of attempts because of the front brake imbalance took a little bit of figuring out before eventually I replaced the lot, as I had a set of spares on stock anyway.
I also serviced it, inc full synth oil, filters and an entire new set of spark plugs (genuine bosch) and have had the cambelt and water pump replaced (the only bit I didn't do myself).
Since I've also fitted a BOSE sound system, as the factory setup was pretty tired by now, plus added a factory GPS unit, as the old original blaupunkt kept erroring and the wife has no sense of direction anyway.
I think you have to settle for the fact that if you buy a car for much below £1,000 there comes a point where it's understood you're going to have to spend probably about as much as the car again on parts / labour (unless like me you do a lot yourself) to make it a road going example.