I've tried to resist the urge to spend to much by being very selective. In the past 5 years i have only bought 30 items. I would like to start selling too but it seems like more trouble.
I have long periods where I don't buy anything, and then I really get into it and buy a lot of stuff over a short period of time.
Over the years I have sold a number of things, and it is quite a bit of work. But I'm about to the point again where I need to sell some things, so I may be selling again soon.