2) and 3) don't seem to actually apply to sneakers here:
2) I've used the app before, the fact that someone else and I both want these sneakers doesn't make our purchase of a pair each a "common enterprise".
3) I didn't expect profit, and buying a thing which can be resold for profit doesn't mean every purchase of it was an expectation. All my sneakers are worn.
2) I've used the app before, the fact that someone else and I both want these sneakers doesn't make our purchase of a pair each a "common enterprise".
3) I didn't expect profit, and buying a thing which can be resold for profit doesn't mean every purchase of it was an expectation. All my sneakers are worn.