Welcome to the forum! :wavey:
Yes, a lot of people sell their pins on here, but you'll need to be a bit more active first. (There's a minimum amount of posts before you're allowed to post a sales thread!) I suggest you browse the forum for a while, comment on threads you're interested in, and ask whatever questions you may have. (We're a friendly bunch, and here to help!) 🙂
Another website I strongly recommend checking out, if you haven't already, is pinpics.com. It's the most in-depth database of Disney pins there is. You might be able to find some of your Mom's pins there, and between PinPics and eBay, you might get a better idea of what the pins you have are going for these days. :bigthumb:
Wishing you the best of luck!