Baffled Raffle

Yossi Swapped his raffle ticket with Shimmy's and Shimmy won the first prize. who owns that prize?

Pressuring a Store to Take Back Purchase

I bought something in a store and wanted to return it. The customer service person was reluctant to take it back, but I was persistent and she eventually agreed to it. Was it permitted for me to handle it as I did, or did I violate lo tachmod (I heard in a shiur that you can violate this when pressuring a store to give a refund)?

Meating Halfway

At the Shabbat Table

Pressure to Include Second Storage Room

Buying a House with a Hidden Treasure

My student asked me the following. Shimon buys a house from Reuven at a normal price even though he knows (and Reuven does not) that there are many gold coins hidden in the attic walls. Is the sale valid? Why/Why not?

Sellers from Outside Town at Market Day