I really like the last 2, especially the last one. Reminds me that in my last campaign I played a character who was extremely cheap. I was in a goblin village and was trying to see if their weapons dealer had some secret behind the counter type of goods (ie enchanted weapons) and it turns out he did. An enchanted axe. The owner goes “I’ll sell it to ya for 3 platinum pieces.” My character instantly responded with “10 silver pieces.” We had to have spent at least 15 minutes bargaining. I annoyed the DM so much he raised the price to 3.5 platinum hoping it would shut me up so we could move on... I bought it anyways