This is one type. Others may have more snare wires or a guitar wire (Flamenco Cajon). That all influence the price. My suggestion is not to overpay this kind of instrument.
If you are in a position go with the one that has adjusting knob. You will have more sounds variation.
Don’t start without a Cajon seat, it worths every penny.
The last possibility is addon is a Cajon pedal. For me, not so affordable since my Cajon cost 60 bucks, buying a pedal 3 times more expensive was not an option.
Similar to a seat, it will make your life easier. You will be able to sit more naturally. Here is what it looks like.