I don't often go to Jumble Sales, mostly I find the rewards are not worth the effort.
Yesterday I made an exception as this was a GIANT jumble sale
First there's the queueing - I arrived half and hour before the start, and there were already over 20 people in the queue in front of me.
That meant no peeks inside the doors to see what delights may or may not lay within.
Secondly the boredom - standing around for half an hour (or an hour if you want to be first in the queue) with nothing to do but wait is quite tedious and feels like such a waste of time.