Here's my list. Feel free to add to it in the comments.
1. Wow! I almost bought this at Walmart! It was on clearance for 50% off!
2. How much did this cost?
3. You could play Santa Claus at the mall and not have to stuff your outfit.
4. I think someone else got me this last year.
5. Well, I guess I'll be standing in the return line tomorrow.
6. Save the box and the wrapping paper. I need a gift for the office Christmas party tomorrow.
7. I know it's an unusual gift, but when I saw it I immediately thought of you.
8. Some say that it is the thought that counts. You didn't give this much thought, did you?
9. Lots of gravy is the perfect remedy for dry turkey.
10. What a great present to re-gift!