Tim - you are absolutely correct on all counts - these sort of figures are just some Fools dreaming, and don't in any way raise the realistic Market Prices and/or stimulate interest in the Marque at all.
If anything, on the contrary.
The early Z's are still relatively affordable and as we know, are still great value for money in the Classic Car world.
Nice to know I can't be completely barking up the wrong tree if someone such as yourself agrees, Duncan.
I've been watching Zed prices for a while now and, the stupid ones excepted, there seems to have been two maior category of car that regularly came up for sale in the various internet places over the last year or so:
£5k and below - 'projects', or something rough but MOT'd or MOT'able that can be kept going with regular attention, but anything at this price is going to cost a LOT to restore back to being a really good one. I recall about 7 or 8 in this category that I saw.
Circa £15k, occasionally a little more - really good cars, which you'd have to nitpick to find much fault with. I can think of about 5 or 6 of these.
Anything £20k and upwards should be pretty special and have something to justify its price tag. Such as the Dave Jarman one up for sale at the moment. The car at the start of this thread is just not even comparable though, as you say, and looks to me like it belongs somewhere between the above two categories, along with the green one on eBay.
I was really put off buying a Zed for a long time because of the some of the barmy prices I kept seeing cars advertised for, both good ones and bad ones. If you don't know any better and haven't spent a lot of time doing your research, the Zed market is pretty difficult to get your head around and it's tough to work out what is a car genuinely worth its asking price, and what is just some fool trying his luck, or a deluded vendor. Doesn't help that the value guides in the classic car mags etc seem to be about five or ten years out of date.
What I can't understand is where all the middling cars are. The £10k ones. I can only recall one recently. Seems everyone who has one in fact believes it's worth £15k or more. Most frustrating, as a decent, solid, improvable, circa £10k car is just what I would like, but they simply don't seem to exist, and I couldn't afford a £15k'er, so I had to buy from the first group and hope I get the chance to trade up in the future.