I put an item up for sale on ebay. Can I leave it there over shabbos, since someone might buy it on shabbos?
Answer:
There’s no problem in this. Because you have no intention to sell on Shabbos, and there is no action of selling on Shabbos, this involves no prohibition.
[Although there is debate over whether a person is permitted to make an acquisition before Shabbos to be applied on Shabbos, this only applies to a transfer that one wishes to perform specifically on Shabbos, and does not apply where one does not plan the transfer for Shabbos. This is the reason why many poskim permit keeping a drinks machine over Shabbos, in a place where most people are not Jewish, as we have expounded elsewhere.]
