1960s Olympia SM9 Deluxe
The Olympia SM9 is one of my favorite portables to type with, and this one is no exception. The mechanism is flawless, and this typewriter would be perfect for frequent and heavy writing. If you're looking to write a lot with a typewriter, then this is one of the best options available in terms of portables. There's some minor rust in certain spots, but it luckily only effects the looks of this machine, but not any of the mechanics. Luckily, most of it is on the backside of the typewriter, so it's rarely visible.