I've seen several times that people offer goods for sale on the Diablo 3 trade chat and add the letters "co" or "c/o" what do they mean by it?
From the decisions it seems to be some kind of auction because the messages usually go like:
WTS [something] 50k c/o pst with offers
WTS [something] 100k c/o pst with offers
WTS [something] 150k c/o pst with offers
[someting] 200k c/o going once
[someting] 200k c/o going twice
[someting] 200k c/o sold
What do they mean exactly, and what does the abbreviation stand for?