I agree with all the responses above. I think the OP may be referring to me. At one point, I had >20 items listed on the classified section. There are still quite a few left. I buy stuff when they are on sale, thinking that they are nice to have and the prices are right. But then after a while, I realize I don't really need all these things. So I'm really glad that there is a secondary market for them. I usually offer to sell at reasonably low prices so that it's a win win for everyone. Most are very high quality gears. And I try to be very clear about the condition if I have used it even just once or twice.
Impulse shopping is definitely a problem with me. The biggest joy for me is the time I bring home a new toy and play around with it. But then after a few weeks, the novelty wears off and the Visa bill comes. Of course I usually only buy stuff at good prices. So that if I need to sell them off, I can at least break even. But I would hardly call it a side business to make money, because the $10 or $20 you "earn" here and there (if there is) hardly justifies the effort. I view it as more of a hobby -- like collecting stamps!
When I was in Japan a few months ago, I encountered and bought a whole bunch of interesting reels (which would otherwise be inaccessible from here, or at least way more expensive). Obviously I bought way too many. As a result, I needed to sell off some of them, although I still kept most of the stuff I like for my personal enjoyment.
Now as far as how many rods I actually own, I'm sure there are many here who have way more. I try to balance the buy/sell activities so that I have about 60 at any time. Whether I use all of them is another matter. But hay it's just a hobby!