The same trading fee applies when buying or selling shares. Trading fee is charged on a sliding scale. More you trade, less you pay.

Here is a current fee schedule as of September 1, 2010:

For example, if you sell your entire position of 100 shares of the specific Real Estate Notes, if you trading volume is in the third tier for the current month, you pay 15 cents per share, or $15 for the entire trade.