"and I would like to get them all

"
Do you plan on getting all of the variants too? If so, its time for you to buy a warehouse someplace. I love pointing out how hard it is to find all of the variants of these machines. For those who thought that someone getting all of the 60s and 70s Hoover variants was tough, that's nothing compared to our challenge. For every version we have actually seen a picture of, I'm going to say there are 5-10+ variants that you have not. Every picture I have posted over the past week is just the tip of a crazy large iceberg with a size that I can't precisely calculate.
As I have posted in the past, I use Hescos part sheets to estimate the number of variants. Based on these figures you, and I, will need to find the following:
2 Wet Dry Vacs
6 Broom Vacs (more than 6, but I'll get to that in a minute)
48 Hand Vacs (some are probably very similar to each other)
33 Can Vac / Power Pak (based on totalvac.com listing for models using type F bags)
14 Classic / XF / Profile style Uprights
20+ (list not complete) Upright / Deluxe / Original MVP
??? Lite / Lite Plus / Feather Lite
8 Carpet Sweepers
131+ total. Probably closer to or in excess of 200.
In both the broom vac, hand vac, and Deluxe / MVP categories I have seen models that were not on the lists that I used to get these estimates. I have a broom vac and a hand vac with a model that is not listed. This makes for added complexity, and a level of uncertainty in what we are looking for.
I tend to specialize, and go for just hand vacs, and will in the future try to collect sets, such as Pro Series, Signature Series, and will probably try to snap up truly odd machines like the sterling jet that I posted in another thread. I also work with metal hand vacs, which adds dozens more to my list.
Have Fun!