preorder or bargain bin?

[swedish]

how many of you preorder you CEs to secure that u are able to get a copy?
and how many wait/hope that it reaches the bargain bin at a reduced price?
i for one only buy them when they are rather cheap. since i dont have a surplus of money and since i like bargain hunting
although it may be a pain when your unable to find a copy, which makes you regret not preordering it in the beginning
(wish i preordered borderlands 2 ultimate loot chest since i have a feeling it may be hard to find afterwards)
(not sure if there is a similar thread to this my apologies if there is)