Boy you guys are way beyond me. I have only the one, a 1909 Underwood No.3 Standard. along with the appropriate service manual, user manual, and a copy of Underwood's 1904 edition from sight to touch. I plan to get the correct cleaning kit and cover ands will call it done. I'd like to get a decent typewriter desk and mount the typewriter, but so far I'm just enjoying my one machine. At some time I'd like to get an early Underwood portable and perhaps a No.5 is in the future, but at the moment I'm enjoying the No.3. I think a lot of collectors get into just collecting for the sake of collecting,and not so much using, so while I do not so much understand the need to have a huge collection, I can not judge another's desire to do so. Personally for me, it is more about the actual typing, and I prefer to get to know my machine and learn to use it well, rather than just collecting machines and not using them. To each his own and I do not judge anyone one machine or one hundred, we all have our own interests and view on the hobby.