I got a mint 10d last year with the intention of using it for timelapse... but it was just too lovely. Celophane still on the digital display, and I suspect less than 1'000 clicks.
What amazed me was the heft. I had sold these when new, but i'd forgotton how lovely and solid they were.
Any other x0d camera feels cheap in comparison, and that includes my 7d.
The images are good, 6mp can go much further than you might think, but a few caveats to be aware of...
- The buffer is small and write times slow. You won't get a great number of continuous shots even in jpeg mode. And I tried it with a sandisk extreme. This is the greatest killer for me.
- There is no windows support anymore. A modern pc won't see the camera so you'll need a card reader too.
- The screen is small and slow to display. Its not a camera you can generally work fast with.
I moved to a 20d as my timelapse cam instead, and for general users it has benefits too...
The buffer is larger, faster, the screen loads quicker for review. 2mp isn't a massive incentive, but you can go a stop higher for noise, so 800 good in jpegs, 1600 managable in Raw, and it has an ef / ef-s mount.
the 10d is very very nice to use. confidence inspiring. great ergonomics. The 29d fixed the bugs and is a much easier camera to live with, beyond that you would need to spend a lot more money to get anything significantly better.
The screen on the 30d and 400d is much better, but then the live view of the 450d and 40d is really useful... where does it end?
My 10d has became a student camera for my wife. I hope it keeps going for a long time, and I hope Canon start making cameras with this build at the consumer level again.
£50 sounds really good, but don't buy a rough one. The shutter life was shorter on this generation (50k) so buy as clean as you can, you'll only pay a tenner or so more for a cherished one.
Oh and look out for old stock 1gb and 2gb compact flash cards, i can recommend contempraneous sandisk extremes, and these tested as the fastest with that slo-o-o-o-w buffer. Larger cards may not work.
But really i'm saying..... buy a 20d instead.