The Asus ROG Phone is the most customised gaming phone to-date. With an advanced 3D vapor chamber design, overclocked Snapdragon 845, 90 Hz refresh rate, 1 ms response time, user-customisable ultrasonic frame buttons, and a re-orientated port layout that favors horizontal usage. Asus as also announced a range of peripherals to improve the gaming experience.
https://www.notebookcheck.net/Asus-s-new-gaming-focused-ROG-Phone-features-an-overclocked-Snapdragon-845-and-ultrasonic-buttons.307494.0.html
There is a headphone jack, you can see it on the render.
A major Taiwanese tech website ePrice claims that this phone will start at around $850 coming with the active fan accessory and with all the premium accessories the price is bumped to $1400 or so.
I'd say the price is pretty fair. This phone has everything an enthusiast can hope for even with out all the crazy accessories.
High refresh rate notch-less OLED display, dual front speaker, 4000 mah battery with fast charging, headphone jack, wide-angle secondary lens, strong performance. All these add up to be an amazing spec sheet.