Many of the older models have been scrapped due to the dreaded Health and Safety rules. Something about the weight of the keys, the angle of the ramping and the fact that no-one makes the replacement ribbons any longer.

If you're in the UK, I have an electric Brother that is very lightweight and still useable, which you are welcome to have, but it's going to be very hard to find a working pre-electric machine unless you frequent antiques fairs, boot sales or scour the 'net for old fashioned typewriters.

By the way, typewriter is the longest word you can type using only the top row of letters on a standard keyboard.

LTS