I don't know how you found this site or if your mother was a member here, but there are many other message boards that have much less stringent criteria and rules for selling personal quilting items. Shipping would be involved but the buyer pays for that, though you still have to deal with the hassle of it.
Personally, I would never again deal with either an auction house or an estate seller. I highly regret doing both. There are advantages and disadvantages to all venues and a huge deciding factor will be what you are willing to take on personally at a very difficult time. I wish you all the best.