Why Is It?

Why is it that people are so proud of buying something for cheap. "I bought the same GPS that you have for $30 lesser" I bought my GPS when I needed it (for a long road trip from NY to Raleigh), you waited until Thanksgiving to buy this refurbished one! And I hate it when people play those guessing games, "Guess how much I paid for this?". I always respond with such a ridiculously low figure, that they become embarrassed and flustered and admit that they paid more than that.