Thanks for the info!
Regarding the VC's art I got this direct from Cam Kennedy and that's how it came - I'll check the actual prog and see if it differs.
Sometimes art was re-lettered (Speech balloons etc can tend to yellow with age, and indeed become transparent over time) for reprinting purposes. I have a few pages were this has taken place, including one by Cam, and it's really just part and parcel of the process, and nowt really to worry about.
Hard to judge by a photo, but even if yours has had this done, it still look very good.
Are these off on eBay?
As always its hard to judge a price for original art. The prices given a few posts up are pretty solid though. I could see some if not all fetching more though.