Hi, Heather!
Here's how I do it:
Go to your shop's home page, right-click on the listing you want to share
Select "copy link address"
Go to the team page and right- click on the place where you can type to post a reply
Select "paste" and then click on the blue box that says "Post a reply"
Viola! I hope this helps!
P.s, don't worry if the image doesn't show up once you've pasted because it only shows up after you finally click the blue "Post a reply" box.
I look forward to seeing your new listings!
Hannah