If a picture of that contraption on the end of the Goblin Multisystem hose did not warn the user as to why the machine was so much cheaper in price than a Vax, then nothing else would. I've nothing against Goblin or indeed any brand being cheap & cheerful and serving a purpose, but those Multisystem cleaners were in a category of their own. The irony of those cleaners was that the shampoo unit was available as a part on it's own, if one could find them, and it could be cheaper to buy the standard wet & dry cleaner and the shampoo unit separately. Not a good deal cheaper, but it was possible. Also there was more that one style of unit. The one pictured here shows a system where the shampoo-water was delivered under pressure. The user had to pump it by hand, rather like a garden sprayer. The other sort just let the water out by gravity.
I see a top-of-the-range Rowenta cylinder there. These will always be one of my favourite cleaners. I do find these pictures so very interesting -thank you for sharing- as it helps to put things in perspective, especially on price. Like how one could spend £134.95 on an Electrolux 612, but only £59.95 on a Goblin softbag Commander. That of course is less than half the price, but in reality you don't get half the cleaner. Probably about 75% of it. You could even buy a Goblin Commander and a Goblin Rio XPC and still pay less than it would cost to buy the Electrolux cleaner!