I've always found that a 100-105mm lens -- rather a speciality of Nikon -- is more useful than an 85mm which has always struck me as being a little too close to 50mm for portrait or landscape. I decided to furnish myself with a £150 105mm f2.8 micro D (ie currently only MF with the Z) as a sort of three in one short telephoto. For wide-angle, it seems that the 35mm f1.8S is more practical for control of bokeh than a 24mm yet still being wide enough for the majority of low-light shots. For the latter, I'm perfectly happy with the 24-70 but I guess that's just my style of shooting.
Because to buy from Panamoz you are at the mercy of the exchange rate.
Let's put it this way....
About 10 years ago £1 get you $15 HK
3 years ago £1 get you about $12-13 HK
If you are buying UK stock then they are probably sticking to the existing manufacturer to UK current EU trading treaty and prices, less influenced by the day to day exchange rate like you are buying from any companies on the far east.
It's my kind of tele, I'm not much of a wildlife shooter but do like to dabble now and then, more birds in the garden than eagles in flight Anytime I've owned a 70-200 though, it was the longer end I used mostly, and always wished it was that bit longer. A 100-400 of course is a lot nicer, but I imagine a 100-400 F4 would be a mammoth and with a price to match - if the 100-300 is reasonably priced and TC compatible ... nice