Let me clarify what I mean when I say that computer games depreciate in value quickly. I am not saying that they are not worth it, or that their cost per hour of enjoyment is sub par. I just mean that in a couple of years I will be able to purchase the entire TW: Warhammer series (parts 1, 2 & 3 + all corresponding dlc) for pennies on the dollar.
I'll give you an example. There was PS4 game called Bloodborne that was released in March of 2015. At launch it cost $80 here in Canada. I picked up the game in November of that same year for $20. Sure that was a sale, but video game values drop very very quickly, otherwise I would not have been able purchase the game at 75% off in just a few months. Today it would be relatively easy to pick up the game for very cheap, and the game isn't even that old.
In my personal case with TW: Warhammer, this effect is compounded because I not only need to buy the game but also a new computer to run it. In a few years time, buying a computer that can play the game even at its highest settings will be MUCH cheaper. With computer power doubling every 18 months, computers depreciate or lose their value very quickly.
Warhammer models on the other hand seem to hold on to their value much better. In a couple of years time a model might be worth slightly less, about the same or even in some cases more money. Consequently I am far better off if I keep my TK army now and by TW in the future than if I were to do the reverse.
