I have never bought a piece of musical gear with the idea that I am going to sell it or get rid of it
I think that comes from growing up poor. We were always taught that when you get something, you use it until it is unusable...then you duct tape it. Especially if it is something considered "upper end".
With this in mind, I research the hell out of a product before I lay out money for it...with drums and everything else mostly.
The only activity that I "buy for possible increased sell bac kvalue" is sports cards...and I don't really even do that that much. I collect cards to becasue of memories of the game, and players. I pretty much hoard cards honestly. I have many, many valuble cards, but do not plan on getting rid of them yet.