It depends in my opinion. Many variables with this company and what you seek as well as preferences. Do you want a three bank typewriter? I would go with an Erika 2 for a three bank typewriter. Do you want a more modern typewriter? Perhaps an Erika 10 is a good choice.  Do you want a certain font? Maybe Fraktur? (Good luck finding one for cheap however) Erika 5 would be a good choice for fonts maybe. Do you want a rare and collectable model? Go with an Erika 20. They have basket shift too. I would personally avoid the newer models, such as the Erika 50. They aren't great in my preference, but you decide! There are many different models for different people, but the main company that produced Erikas, which is Seidel & Naumann, also created the "Ideal" brand of typewriters. S&N is responsible for a lot of typewriters.

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As strange as it sounds today, German klein (“small” or portable) typewriters were among the most sought-after souvenirs for soldiers fighting in World War II. Think of it: Adjusted for inflation, top-of-the-line portable typewriters cost roughly the same as your MacBook Pro today, and their usable lives were measured not in months or years, but decades and generations. Consequently, thousands of Uranias, Gromas, Erikas, Rheinmetalls, Continentals, Olympias, and other high-quality, precision-made German machines were looted from Nazi military and government offices, businesses, and even from civilian homes, whether their owners were dead or alive. “War trophy” is of course a pleasant euphemism: It denotes a reward for heroism, bravery, and sacrifice, while simultaneously acknowledging that even the good guys steal, pillage, and destroy amid the haze of total war.