In a seller's market, it can be easy for buyers to develop some anxiety about whether and when to say "no" to a seller's request. And with demand still outstripping available inventory, there's no question that sellers have felt empowered to ask for what they want. From forcing potential buyers to adopt the sellers' pets to demanding that they be permitted to remove $10,000 toilet seats from the home, it's clear that no request is too strange for some home sellers.