This is a point worth exploring more too: Does procrastinating ever prevent you from selling pipes that later you were glad you didn't sell right away ?
I'll have to think about that. Music can be that way for me. I can not be ready for something, yet know there is something there for me, which nags at me to re-visit and re-visit and re-visit, resulting in me finally liking something. For instance, I thought Keiji Haino was pretty much terrible for years and years, so I never understood the high praise. Many years later, after trying and trying, every few years, it finally clicked, and now I find him to be one of the greatest artists I've ever heard. I could offer other examples like that, but you get the gist. Sometimes, it just isn't the right time, the right headspace, and so on. I can't remember that ever happening with a pipe though.
Back when most of my new-to-me pipes were through trading, nothing laid stagnant for long. Many years ago, when I sold off 95% of my collection, and then came back to smoking, I've only really regretted selling a couple of those. I still look for them on the boards and on ebay (actually ran into one, too). Since coming back, I've only sold a handful of pipes, and none of those have proven to be a regret. I have found it easy, and definitive, to flip the switch on a pipe. Once I've come to the conclusion it needs to go, I no longer see it as a pipe, or as my pipe, but as a nuisance (or something negative) taking up my space; and being more of a minimalist than a hoarder, I tend to feel that a godsend and don't look back.