I also don't want to have to wade through non-photographic posts

I'm quite sure that's a Bayonet lens. It seems to have a large cap at the back. Even if it was made in GDR some of the later CZ stuff was simply rebadged from other GDR factories such as the 29mm ones.

The OP will be able to confirm if his lens has blue lettering "Made in Japan" on the side. Some sources say they were made by Sigma, but it would be strange if Sigma undertook the manufacture of budget primes at a time when zooms were all the rage, unless it was part of a full package

How would he be using a Contax lens on a Spotmatic or Practica?
He even has other Practica lenses It is just possible I suppose, but it wouldn't match any of the other stuff

The Carl Zeiss 1:2.8 28mm probably wasn't made in Germany. It was
probably made under licence in Japan by Cosina?? It will say made under licence in blue lettering on the lens. I doubt if CZ Germany even knew anything about that lens, it was possibly ordered direct by the UK branch/importer. Fairly average Japanese lens but anything CZ goes for a premium on Ebay mostly to Canon users, so I would sell it for around £60 and buy a Pentax 28mm or Sigma 24mm.

The Ilford and Leica cameras (plus lenses)are worth selling on ebay they should be worth decent money. Possibly the Zeiss Ikon and Voigllander as well.

The Nikon lens is quite valuable, not too sure about the Nikormat.
Of the Pentax lenses the 50mm f/1.4 and 105mm are the most valuable, but I would keep them to use on digital.

Make sure that you buy a Genuine M42 to Pentax K adaptor to use on a K-5. The cheaper ones can get stuck.

The Photax 500mm probably has an M42 T-Mount on it. You would be better buying a Pentax K T-Mount off ebay for about £5. A T2-Mount is the same with an extra ring which can be removed.

A lot of these dealers know crafty tricks about getting feedback removed or they make very generous offers in exchange for positive feedback. I had a problem with a lens once and the dealer told me to keep the lens and he would do a full refund as long as I gave +ve feedback which I did...... did I get the refund..... no chance! Others take the transaction outside of ebay with excuses about it saving a lot of reports etc.

From one of the feedbacks (for a £154.99 lens) I notice that they send stuff by normal mail.

"I'm happy with lens. Packaging was poor, sent recorded deliv not SD. No back-cap"

I don't have a problem with that. The seller is responsible for delivery.

One of his negs is for a £195 camera described as Fully Serviced....
Not as described. Shutter damaged. Back loose. Refund requested......
so much for the servicing

You could upload the (800 wide max. )photos to here:
http://uppix.net

Then copy just the filename from the "Direct link:" hxxp/xxx..xxx.jpg

Click Image on the message bar and paste hxxp/xxx..xxx.jpg etc.
between the centre of the two sets of square brackets making sure that there aren't any spaces.

Click "Preview Comment" before posting to make sure that the
photo is showing OK. Leave a blank line between photos.

Then click Add Comment as normal.

Seems to be a lot of people around with more money than sense

Top shots again, I like the guitarist (3rd)shot as well
even though there is a distracting highlight on his amp.

I prefer normal colours though as per the last two.

What do you set your WB to when the lightings coloured?
Tungsten?

Soon as I sort out the K-5 Spirit Level

Part of the path area looks dirty I may not be able
to manage that

It would be the simplest job in the world to replicate that
photo..... so why is that special

It reminds me of kids drawings

Because the sitter wouldn't be very happy if you told them you were photographing them using an "Ugly Dish"