I got it under control by...
I got it under control by moving into a bigger space....Hmmmm no, that didn't work.
Less is more isn't always true.

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A lot of it is also the rando...
A lot of it is also the random rewards aspect. That's the thing that keeps research monkeys working hardest of all to get their treats---when they know they'll get something but they don't know if it's the next attempt or the tenth or the thirtieth. It COULD be the next one because sometimes in the past it was the next one, therefore one must keep trying for it!
I could make a very, very long list of all the glorious stuff I got for cheap but it would just make me weep like a poor little monkey in a cage who only gets regular meals of bananas and Purina monkey chow.

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I am
neither a dealer nor a collector -- but it seems eminently logical to me that one would buy a salable object when it appeared at a good price, with the idea that one would either keep the item or sell it -- sooner or later -- at a profit.
Does one need to feel guilty for such an action ? I wouldn't think so . . .

SDR
"sooner or later". And therein lies the rub. A hoarder might say " There, I sold something, I can do it whenever I want". This is of course while acquiring umpteen other things.
I know this and an unlimited number of other personal snow jobs that myself and others I know have done as justification. In some cases the line is a bit blurry.
On another note, I do hold the personal theory that given the sample of the number of dealers I know, this profession is largely populated by hoarders who are hiding in the justification of it, or are trying for a cure. I am likely a bit of both. I know of only one dealer personally, who is not that way and oddly enough he is a diametric opposite. He lives in a very minimal setting and can not stand any extra anything. And he has every bit of the passion for this subject the rest of us do. I am definitely a little envious.