I read this in my quiet time this morning. What stuck out to me was that the owner of the threshing floor just wanted to give it to King David and not accept his payment. However,
"...The king replied to Araunah, 'No, I insist on paying you for it. I will not sacrifice to the LORD my God burnt offerings that cost me nothing.'"
Wow, next time I have a crazy day before Bible study I will remember that my offerings should cost me something.