My short answer is, YES!

I rarely pass up on an extremely good example of a model if it's modestly priced. I have a few reasons for this practice, and there's really no downside to it. On the flipside there are often subtle differences between them: for example, I have three Royal FPs because I wanted an example of each typeface. And then there are the shelves full of SG1s that are mostly all different model years, carriage widths and feature sets. A layperson would look at them and think they were all the same - but maladjusted collectors would recognize their variances.

I consider the '50s to be the golden era of typewriter manufacturing, and in terms of aesthetics, models from that period are my absolute favorites.

I have two (2) Royal Futura 800's in my collection.  One grey and one cococa colored.  Each has a differing type size and font.  I had plans to pick up all five colors of the Futura 800...but gave up that thought and focused on more German and Swedish machines.

A year of so ago, I actually had three (3) Olivetti-Underwood 21 machines in my home.  Had one that was missing one part to make it 100%.  Got a 2nd. parts machine for $ 19 but when it arrived it was too nice and functioning almost perfectly but was missing 2 parts.  So I bought a 3rd. machine for $ 12 locally that was missing it escapement and carriage trolleys...but it had the parts I needed for machine No. 1 and machine No.2.  I kept No. 1 and gifted No. 2 to a teen in our neighborhood.  Machine No. 3 was taken apart and placed in storage for spare parts I might need in the future on my operating machine.  Chassis went to our local metal recycler.

The car is stunning, a work of art, but justifying its purchase as accessorizing a Royal Futura 800 would likely initiate divorce proceedings for me.

Pete E. wrote:

 ... I had plans to pick up all five colors of the Futura 800...

Periwinkle Blue, Mist Gray, Cocoa, Americana, and Meadow Green.

I had a similar idea for the FP, but there were eight paint options for that model, and I quickly realized that it would be an expensive and pointless pursuit. Gray was the preferred choice for a conservative office, and as a result it likely outsold all of the other colours combined by multiple factors. All of my FPs are gray, as were all of the local ones I passed on over the years. 

 

Generally no.  I keep only what I use.  But there are exceptions.  I buy a lot of Royal Ps because I love them.  I haven't kept any of them though, I own one and it's enough.  I do own two William's, they're rare and my favorite.  Other then that, I'm not big into collecting.  I mostly just enjoy fixing and typing.