From the orchid FAQ
I have a terrific product that is bound to be of interest to
everyone on this list. Can I present it on Orchid?
Orchid is primarily a forum for discussion -- a free service
maintained by jewelers for other jewelers. You can certainly
mention that you have products and/or services available should
anyone be interested, but persistent advertisements are not
appropriate. However, the Ganoksin Site offers advertising
services. Take a look at all of these and see which one will
work for your commercial needs.