haha yeah. i am wow player and does lots of Auctions that is why i know this kinda of stuff.
I reckon 5 or 10 sec since you can find out whether you have activated it or not after you doing so.(since there is no indication...... so you dont need to wait for 25mins to tell if you have actually activated it in case you might wonder later.......or nothing like 0.00001 sec those crazy value..lol)
and make sure the cursor is not on anywhere that might have function-placees like "end turn" button.....