E-Trade is one of the best stock brokers online with a commission of $9.99 per trade on unlimited shares. It is a flat commission no matter how many shares you buy.
At E-Trade you can buy penny stocks online that trade as low as $.0001 a share.
One important thing about E-Trade as a stock broker is that they are a SIPC (Securities Investor Protection Corporation) member. One should look into this protection when shopping for any broker. Being under the SIPC means that if a brokerage firm goes out of business then your cash and securities held by the brokerage is protected up to $500,000.
Overall, E-Trade is one of the top brokers in the industry for low flat commissions and buying penny stocks online. Learn more about E-Trade