Bargains on eBay are there, but patience needed (question to self, am I patient?).
I picked up the modern spec Hornby 08, R2417, a beautiful model for £26 post free.
Why so cheap? It was minus coupling rods, which I've just bought from Lendons of Cardiff for £1.68.
A bit of a risk as there might be something else wrong, but I still think a bargain compared to the price they are fetching in A1 condition.
Neil