Interesting but to many types for me and to far away. Thanks for the alert.
I sold over 100 orchids one weekend by advertising on CL. Surprisingly, a good place to downsize a collection. I sold old Orchid Magazines, books, pots and potting media. Most people are from the area and can contact you with any questions. I had a good experience.
I vouch for Craigslist as well and have made quite a few local plant friends buying, selling and giving away extra plants. I even wrote up a web article on the subject...
Craigslist and Orchid Societies
All ads are automatically deleted after one week so rather than having to visit Craigslist every day I recommend using RSS to find out when orchids are advertised on Craigslist. For folks not familiar with RSS here's a page I put together on the subject...
RSS for Orchid Growers