I belong to two Yahoo groups, SewItsForSale and Pinsandneedles1.
SewItsForSale allows members to post items for sale, or in search of. An alternative to e-bay for sellers, as there are no fees. Any sewing items are allowed, from machines to notions, fabric to patterns.
Pinsandneedles1 is run by a woman who sells cutters, dies and a few other tiems. Her pricing is about 30% off MSRP.
Both groups are moderated and need approval to join, but are free to join and some great deals!