Originally Posted by Eny-
That depends of the edition you have, i have a large dvd collection, and whenever i got the chance i buy nice collector's editions that usually have only a thousand or so copies... So if in the future i want to sell them they are worth much more money that the actual price i bought them...
You assume somebody in the future would want them, this may or may not be the case. If you look at any major collectables they all have HUGE price peaks and valleys over the years and even the same item can vary alot just because of condition.
Anybody who buys an item with resale value in mind is not a collector, they are a speculator.