I got my bits from Focus and I did the shed guttering for around £12.
Trouble with anything you'll get off Freecycle is that there is a reason someone doesn't want it - usually, it's old and knackered. Personally, I'd bite the bullet and at least have something that won't need renewing for years.
Don't get me wrong, I've had some fantastic items through Freecycle and I hope you get what you need and save it from landfill.