Those are the same bonds that this broker buys from Bond Express, marks up and then claims that its prices are lower. Apparently not, which means that the broker doesn't make a market in the bonds it sells. Because munis don't trade on an exchange, this could become a problem for its clients. Buyers beware The new online brokers would have you believe that municipal bonds will trade online just as stocks do. This is not true.
Stocks are generic in nature.
For example, you can buy 1,000 shares of IBM from any number of brokerage firms at the same price because they trade on an exchange. Not so with bonds. Veteran bond buyers know that every bond in the secondary market has its own distinct characteristics and nuances. That's why online brokers are unable to buy back their own customers' bonds. They are not bond dealers.