Along with the "gold" 65 Convertible, the 707"A".... the robin's egg blue version of the billious green 707.  It was made for only a week... and made FOR Spiegle, the "denim"Convertible,  the Bicentennial (obviously made for a short time(),  just for a few models that would  be considered "rare".

  Here's that 707A

Turbopower 1000's aren't that rare at all.

Turbomasters are more so, but it depends on the model. The softbag one's are quite rare, the exclusives are like gold dust.

You have to bear in mind that Hoover were a HUGE seller for many years, so the main lineup models aren't that rare at all, with the exception of the U2336 Turbopower. Despite being a big seller, it was made of incredibly brittle plastics that were prone to splitting and shattering, so not many survived. The store and catalogue exclusives are the rarest models. For example, there was a pale blue Turbopower in the early 90's that was an exclusive to Argos and an all black model exclusive to Littlewoods. I don't think any of the UK collectors have examples of those.

I'd say the most rare overall are the Concept 1's and the later Convertible uprights (Dial A Matic in the US) . They're very hard to find over here now. Some of the top end Sensotronic's, Freedom's and Compacts are also quite hard to come by too, especially the ones with the powerheads - they were very expensive so didn't sell in such huge numbers as the cheaper models.

The freedom's are rarer than the standard models, yes. They were more expensive to buy but were bloody awful so a lot of people got rid of them.

As I mentioned, the rarest Turbopower's are the exclusives. Not so much the Electricity Board models, but there were models that were exclusive to various catalogues and department stores that are incredibly rare.

No, the U2716 was part of the main line up. There was a model above that one that had cord rewind.

Here are the exclusives mentioned earlier - the 2 Argos models, plus the black Littlewoods model. I've only ever seen one of these in person.

some more rarities. All 3 of these are pretty rare now - the two Concept 1 machines and the very last Junior Deluxe in cream and brown.

The Concept One was sold here, but it's damn hard to come by these days

Have you been talking to Alex, by any chance? He's brainwashing you ;)

on the top.  It was referred to as the "snorkle", as, that is what it resembled.  Later, that big 'neck' was frefined to the one we all knew.  A few yrs ago, when Constellation" returned briefly,  it still connects  the same way, but, the coupling is simpler.

Glad to be of help.

John

Then, the more popular is................. Removing that snorkle was a big cost reduction.