I bought my Profisix a bit over 30 years ago brand new in Germany, not the cheapest, but I have used ever since and slowly picked up most of the accessories.
Agx I agree the spotmeter attachment is rather large, but it is really accurate, plus you can change from 1º to 5º to 10º at the twist of a switch, that is the good news. The bad news, to read the changes you have to take the meter away from your eye and take a reading. Apart from that, it's brilliant.
I also used the lab attachment under the enlarger for a while and still do if I visit someone new to enlarging in their darkroom. Picked up the repro attachment and that worked better than I thought it would for under a reproduction camera and photographing flat pictures.
The tele attachment 7.5º and 15º is the one attachment I thought I would use the most, but I don't, I prefer the spot meter attachment instead.
The Profi Flex was a real sleeper, didn't really know if it would be useful. I picked it up for a few dollars about 20 years ago and it lay around, one day it was used for ground glass TTL to ascertain correct exposure for extreme bellows on a view camera, dead accurate. This can also be used with a step wedge and a light box and you can turn the Profisix into a sort of densitometer. Certainly tells you if your shutter speeds/gradations are accurate.
The Profi flash attachment works, I have the original model, but I wouldn't say it was that great, but it works.
I've used the Profi select TTL but that was a work situation and came with a pair of Sinar 4x5 and 8x10 cameras we had in our studios. It was using these that made me get the Profi Flex.
I have also used the profi Lux in a work environment, never seen one for sale, would pick one up in a flash if one was handy and the right price.
I have seen the Profi-Color being used, it works is all I can say. From memory one had to consult charts to get correct readings under certain situations. The studio had one for evaluation, it was so bad we handed it back before we had to and bought a dedicated colour meter which I think may have been a Minolta unit, not sure.
They are a wonderful meter, if you see the odd accessory around for the right price and they could be useful for you, then get them, they certainly enhance the meter.
The Profisix was replaced with the Mastersix, I think. The Mastersix was pretty good, but you don't see many of those around at all. Maybe they never sold, maybe they stopped measuring light, I don't know.
I have seen this single Profisix meter sitting in this establishment for decades now. Originally it was for sale at $1,100 AUD plus sales tax of 32% or $1,452 AUD. In July 2000 Australia switched to a VAT type of tax and the meter came down as the tax was now 10% instead of 32%.
You can see that it is still for sale and is brand new here. Interesting price dropping, maybe they realise it is sort of really over priced, it must have been in stock for close to 20 years.
https://www.vanbar.com.au/catalogue/product.php?id=94973
Mick.