Asking for Opinion

Hello, I wanted to sell my Xiaomi pad 6 the 8/256 variant, but idk the selling price for the second hand pad, and since it is second hand, what will be the price that will be justifiable? oh, by the way i have the original pen and keyboard as well, i will include it as a set on selling since i have no use for them if i sell the pad. anyway, pad is smooth and no issue, i got this on november 2024, so what do you guys think? is 18k a bit pricy? or is it low? i just don't want to have regrets after i already sell this 😭 so i will be taking opinions. thank you!