I just ordered another case of 64 books.
My supply of books to sell or give away on my eBay store is just about depleted. For the record, no one has bought the book through my store. However, I add the Better World book in the package with any orders I mail out.
When I “only” (usually) used Priority Mail, there was no additional charge for me to add free items to the order. Priority Mail covers up to 70 pounds domestically and up to 50 pounds internationally.
Ground Advantage came out and it goes by weight like “regular” First Class mail. Once I add the size of the package, differences in weight under two pounds seems to cause little change in the price I am charged for the mailing label. So, I still try to send books. Added bonus is it makes a great protector inside the package to keep the ordered book safe from the package manglers!
Now that I will have a renewed supply, I will carry more books in my vehicle that I commute to work.
Permaculture for the win!