Just getting back to you about your question!
You can trade items now to other users using our
user to user bank transfer form.
We're not currently letting people exchange items in for sand dollars but I may open that up later; it wouldn't be for 100% compensation though or I'd have a lot of sand dollars to give lD Kind of like in a video game where you buy something then try to sell it back and it loses value of sorts? I haven't figured it out since I have a lot of other stuff on my plate right now D:
I'll make a note for the next time I have free time to work on community updates though! C: