RSS,
I'm curious if the $5 covered your costs? I know the post office has been increasing their costs each year but I have strong memories of sending out many plants in prior trades / giveaways and they almost always cost less than $5. Today I shipped out a small priority box with 2 - 2.5" pots & 2 smaller pots. It cost $8.70. Obviously, an additional $3.70 won't break anyone, but it's all adding up - especially when I do larger giveaways...