It might be confusing that co and bo actually mean the same (co = current offer) (bo= best offer) both meaning that the last guy that offered had the highest offer.
i trade alot with csgo skins at csgolounge ppl use "bo" or "b/o" for buy out, like an instant sell price. i think that would make things more clear.
btw its way easier to get a trade or a sell done when you know how much you want for the poke :P
greetings SniicKerSz