I see that I'm late to the party here, but I just came across this post while doing a little searching to make sure I wasn't about to reinvent a wheel. And of course, the topic I was thinking of bringing up has already been discussed. :-) So thank you, especially those who mentioned shoes.
This can be generalized to anything that is well made and lasts a long time, but the catalyst for my concerns about minimalism and mustachianism living happily under one roof was my shoe collection. I do have more "non-work" shoes than I should, and I'm working on that (is it wrong that I was almost happy the other day when a flip-flop finally broke?!), but the real problem is work shoes. About five years ago, pre-Mustachianism for me, I bought nine (yes, I know, I know) pairs of Dansko and Sanita clogs for work, all on sale on Amazon ($120-->$50ish). ("This will be fun," I thought. "Look at all the pretty colors," I thought. "I'll just return the ones I don't like," I thought. How stupid. And the weird thing I was never that kind of shopper before and never have been since.) Problem is they're such high quality that I don't know if I will be able to wear them all out over the course of my career, and they take up more space than I would really like to give them. I don't think I'd get much in terms of cash for used shoes. So... donate them to someplace or keep them and try to wear them out over the next 8 years? (Or what I think will be 8 years, if my FIRE plans go well.)
What do the rest of you do with well-made things that will last "forever," can't be sold for very much, and are still useful, but are more than you need? I guess I need to get over my stinginess and just donate them with the hope that someone who really needs them will find them.