Recommendations for a 3 to 4 octave auxiliary keyboard?

Water Land

New member
I have a full 88-key keyboard already and have been playing daily for two years. I just got a job that will allow me to basically sit around for 6 hours in the day and think it's the perfect opportunity to practice. So I want to buy a 3-4 octave keyboard and bring my headphones in and work on my improvisation. Trying to get a little bit better and work on my ear before I dive into producing. No rush. What would you recommend? Are there even any weighted keyboards that are that small? I'm looking for something between $200-400.
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