I'm looking for the outer limits of what is considered a valid sale of חמץ. We do use some tools (Shtar, Halifin) to effect the sale and make sure it's "legitimate". As two example issues of this general question:
- Can a totally ludicrous amount of חמץ be sold at a totally ludicrous price? Does the buyer need to have some credible ability to effect the sale (assets, investors, etc.)?
- I know a person needs to be a willing party to any sale, but can Hefker Beith Din Hefker be imposed on anyone who is not interested in participating (yes, there are other ramifications, like if the now-former owner eats the food that was just sold he'd be stealing from the buyer, but in theory it should work, right)?
Tying those example issues into an out-there example scenario: could the Chief Rabbinate of Israel sell the חמץ of all the Jews of Israel to a local, non-Jewish day-laborer?
In short, what limits are in place to ensure the sale of חמץ before פסח is legitimate?