Yes, staff
and members can use the member shop to request, sell or auction off items.
Members or individual staff may offer custom skins in the member shop. However, BB itself won't be offering custom skins in those forums. We may offer custom skins in our official shop, which should be released sometime next month.
If you're in search of a custom skin, you may request one in the
Community Exchange forum. If you're willing to offer credits for a custom skin, you may use the
Request Goods forum.