Garage Sales and Credit Card Readers

Square Credit Card Reader

I want to have a garage sale! Is this odd? I hope not. I think we've accumulated a lot over the years. Also, I found an inexpensive card swiper for smart phones. What a great idea! I will be looking into this as an option for the future. It would certainly simplify business transactions, large and small!
Has anyone else ever used this? I was only able to find one review on Amazon.com