town teleport duration

Hi, sorry im sure that this has been discused but i cant find thread with answer.

Why is that the teleport back to location where i was disappears in pretty short time? How long is it? I never have enough time to identify/vendor items when in town. I would appreciate little longer time to tweak my stuff thx :)

e: well i guess it has somethin to do with balancing the game dynamic, ok ill just put it into stash fast and tweak on waypoints ^^