Found someone cheaper than me

I forgot to mention this but a few weeks ago I found someone cheaper than me! I sold something on eBay and to ship this item via Priority Mail would have been $5.70 and they would get it in a few days. The other option was Parcel Post shipping for $5.60 (a whole DIME cheaper) and it would take a week or so for delivery. They chose the Parcel Post shipping to save a dime. I mailed it via Priority anyways just so I wouldn't then get an email from them asking what was taking so long for delivery.