If you had an item to sell, how would you choose between posting it in the FS thread here, or posting it in FA while listing on eBay? Do you always do one or the other, or does it depend on something specific to the item?

What is FA?

For Auction, as in eBay. Both threads are on the DV Info website.

If you're not worried about time, I would say try the For Sale and Craigslist first, then go to ebay as a last resort.