I currently have a Korg MicroKey Air, the 37 key variant. Some people don’t like it, but I’d recommend it as it has a pretty good build quality and feel for the price, and the Bluetooth is particularly good for convenience, along with its weight.

As others have said, keyboards like these unfortunately do not usually have audio come with them as controllers are almost exclusively meant for use with software. They aren’t usually used widely for playing as producing, so playing a midi controller will be naturally different than regular piano. That also being said with the lack of audio.

If this lack of audio is a problem, then honestly the lowest price sound-controller I would recommend would probably be the Yamaha Reface, which would run you double your budget. I do have pretty high standards when it comes to electric piano sounds, but I urge to say that keyboards under this price tend to sound… off.

Also, if you find a good model over your price, do not be afraid of used keyboards! As long as you have a good way of returning it and you clean it thoroughly prior to use, it is simply a good money saver.

So, TL;DR, if you are looking for one recommended model in the price range, I would maybe look into a Korg MicroKey Air. Hope you do well!