Bava Batra 98: The Customer Isn't Always Right

2 mishnayot! First, wine that goes sour is not the seller's responsibility, unless he knew it would sour. Plus other cases where it turns out that the seller is in fact responsible (e.g., if he brags about how great the wine is before the sale and then it goes bad). Also, the difference between "old wine" and "aged wine" and "cooking wine," in terms of caliber. Second, in the event of building a small home, with modeling on the Beit HaMikdash. Plus, mention of the Wisdom of Ben Sira.