I don't like paying to give things away free... if the number of credits I receive goes high enough to make it worth it (say 300 or more credits) then I will do free shipping.
You probably won't need many credits if you're willing to send the $1 to help with shipping. My guess is there aren't many people on Listia looking for 4H stuff.
That is true. I have been "stiffed" by one person who received my shipping cash and didn't send the item to me. Usually you can trust a person who has been on Listia a long time and they have a high seller rating -- but you should do what you are comfortable with.
By the way... nice turkey pic on your profile. My husband didn't get one this year.