ebay them.... you'll get more than $25 each thats for sure.
if you have a buyer who wants them posted, go to a local tyre shop and ask for boxes (I managed to collect like 10 of them when I moved recently... great strong boxes).
there's plenty of companies that will ship the rims packed in boxes, but not as many who will ship loose wheels.
they only deliver depo to depo, but have a stack of depos australia wide. used them on a few occasions with no dramas and are literally half the price because they dont have to stuff around delivering door to door.