Pay Pal fees hit an all time high.

I've shipped some smaller items recently for as low as $4.35.

I always do the cast calc to see if standard is cheaper than priority or flat rate.

If you are shipping books, magazines, video, etc, you can use "media mail" (formerly "book rate"). It's often $3.85. IIRC there is a technicality that might let you ship anything bundled with a book :)