[Q] how high pricecheck value would i be able to ask for when trading bayo ruby for bluegem?

As the title says

I got 1 of my lifelong trading goals today, a fn bayo ruby! #humblebrag lel

BUT as u all know when u reach a goal u set up a new one, so my heart is set on finding a sick kara ch!

Just curious as to what range of karas i can reasonably expect, like my knife is 450ish keys and seems to be rising everyday due to the hype and gems (from my own experiences) never sell for the initial PC price, this all my sound stupid but i dont know where else to turn and dont wanna make a trade post yet cuz im a wuss who dont wanna get sharked :b

Anyways all answers will be highely appreciated :) Ty in advance!