Thanks for the comments, everyone. Unfortunately one of the original Warwick tuners snapped, which is why I had to replace them! I've heard this is quite common with some of them.
It's in pretty good condition with only a small bit of thumb wear above the neck PU and very light buckle rash on the rear.
It's the different variations over the years that have been throwing me off getting a figure in mind.
I'll see how I feel in a couple of weeks whether I really want to part with it at around £800. Having had it from new (paid for by my student loan!) it holds a bit of sentimentality, so we will see!
Thanks again!