I have 4:
The first I got in the mid-80's, and love
I found out if something happens to it, thye don't really make parrts for it anymore, so I bought one sold for parts only, one that works, and one model that's 'kind of the same'
I only use one at a time, but I use it a lot, and have spares, or at least spare parts, for if it stops working